The best speaker for a small room...at any price point.

There is probably no "direct" answer as a soundsystem has to be seen as a whole, including the acoustic characteristics of your room and your personal tastes!
I love the Dynaudio Contour 20 on my friend's Krell KSA-100s amp + KRC3 Preamp, Ayre QB9 DAC.  Il like my Ryan R610 coupled with my Rega Elex-R amp + Rega DAC-R.

ProAc D2http://www.theabsolutesound.com/articles/tested-proac-response-d-two-loudspeaker/

I used to have B&W 802D in 12x13 room. They sounded excellent at 7 feet from my chair with condition that most of wall space was covered with acoustic panels.
Most KEF speakers (starting with LS50) will work in small rooms too. QUAD ESL line is DESIGNED with small room in mind.

I also have KEF LS3/5, and I don't miss anything when playing acoustic music.
Kind regards.

I have a 10X10.5X8 room for my ATC SCM-19's. I listen near field, an ideal listening location for a small room with monitors. If you set your room up right and have the power the drive the ATCs you'll be very happy.


Rollin

Consider future system changes. If you limit yourself to choices of high sensitivity/efficient speakers, then, now and/or future, you will be able to use lower power amps successfully. Then your amp choices become many, opportunities for a great deal for one increases, saves money, space, .. that opens the options to tube amps. Not only are tube amps lower power, among them, the cost reduces as you reduce your power needs.

A system of monitors without too much bass, properly matched to a well controlled self powered sub woofer will make imaging easier, as the monitors will make narrower sound waves, narrower faces, improved imaging, less room interaction. 

Powered sub-woofer also helps you use a lower power amp, as most power is needed for controlled bass.

You can upgrade the monitors and/or subwoofer separately in the future.

Take your time, it is work to get a setup with sub-woofer right, but, then you get the advantages I mentioned.

A lot of recommendations for speakers that are still too large for that size of room IMO. I'd stick with speakers no larger than the size of ATC SCM11s. Their sealed box will make them placement friendly. If an in-home audition is not an option, I'd probably choose those or the new Spendor Classic 3/5s. 

Augment the low octaves with a DSP-adjustable sub.

I am pretty proud of these and we received spectacular feedback during AXPONA.  I am currenty waiting on parts from Europe but will be back in stock in a couple weeks. Great soundstage and true sound reproduction.  If you are interested I might be able to express in parts.    

https://verdantaudio.com/collections/verdant-audio-speakers/products/blackthorn-1-standmount-speaker?variant=26459232567396

If you are not going to move, the electrostatic Martin Logans have a small and musical sweet spot.

I have some Watkins Generation Four.  They work great in a small space.  I bought them on trial planning to return them.  I immediately knew that was not going to happen.

I second: Fritz Carrera BE. Own a pair in similar size room and at 86db will drive almost anything with unbelievable imaging and solid bass to around 37HZ. And Fritz has 30 day trial period with full refund....how can you go wrong!

Consider Davone Studio’s ($2995). Not a lot of US dealers but I’ve been very happy since purchasing 11 months ago. Used with Clearaudio Concept TT & Parasound HINT 6. 

KEF LS-50 with a SVS SB-1000 is excellent in a small room @ about $2K.   My room is about the same size as what OP proposed.  I compared to my Pioneer S2EX ($6K) and the KEF system is much much better at least in my small room.  I recently bought Tekton Impact Monitors so I could eliminate the subwoofer but they are not set up yet.  I was told by several people that have heard/owned both that the Tektons should be much better than the KEF system in my room.  

Do yourself a favor and try to listen to anything by Wilson Benesch in their Geometry Series!
http://wilson-benesch.com/geometry-series/

@perazzi28. I have always liked the Wilson Benesch speakers I have heard in the past. I will try and hear a smaller stand mount in their Geometry series, although they too seem to have few dealers here in Calif.

One other thought, and that is to acquire a pair of stacked Quads...the original versions. To my ears, these speakers are some of the purest transducers in the critical midrange of anything that I have ever heard...not sure if they would work in a small room...and if I can accept their limitations in the other areas of the frequency spectrum.
Anyhow, other thoughts on speakers for this size room is appreciated.

Davey, I had original Quads and moved to the new series, which give another octave top and bottom, but are no more musical. I modded two pairs of 2905's to improve clarity, and could not be happier. Larger, irregular room.

One of my friends has a triple of stacked original Quads, and they sound wonderful in a room of 9x18x29. In fact, the best room I have ever heard.

A follow-up to my earlier recommendation.  I own a pair of Wilson Benesch Vertex (from the Geometry series).  Extremely satisfied.
Cheers and good luck!

There are 3 which are as good, or better, than anything mentioned above at bargain prices!

1.  Wavetouch Audio - Grand Teton or Antero.   Simply superb sound in all respects.  Free home trial.  Best value and possibly best sound.

2.  Proac Response D2.  Also superb in all respects.  And at a bargain price.

3.  Legacy Audio Calibre.  Also superb, but at a price.  Or the Studio HD at a bargain price.

If not these, go with the Gamut RS 3i, but at a ridiculous price.

Anyone have thoughts on the magico a1 and persona B ?

You might want to pay attention to the room itself. Data are scanty at such a small room size, but you might want to try 7'9" x 11' x 12'11 1/4". That ratio simulates very well at 50 cubic meters, and you only have 31 or so; but who knows?

@smodtactical I am going to do a home trial of the Persona 3F with an Luxman which should soften the top end. I expect this to be too big for my 12x11x9 room but it does not hurt to try the home demo.

I was considering the Magico A3 before I heard the PErsona 3F. I thought the top was better integrated with the Persona and excluded the A3. For that same logic I am not looking at the A1.

As I mentioned before something the size of the TAD ME1 is what will work best in a room my size but I want to try the 3F floorstander just in case it works without DSP.

Focal Kanta 2. For some reason I never auditioned this one. Think I will before I buy the next speaker.

http://www.tonepublications.com/review/focals-kanta-no-2-speakers/

Tipping the scale at just under 80 pounds each, the Kantas are extremely manageable. Only 44 inches tall and slightly more than 12 inches wide, they will be at home in all but the tiniest of rooms. Like any speaker, a little extra room to breathe is always a good thing, but the Kantas deliver excellent results in even our smallest listening room, measuring only 11 x 13 feet. Thanks to one of the two ports being front firing, this speaker is easy to place for optimum coupling to the room.

Anybody hear these:
https://www.dragonfireacoustics.com/copy-of-hi-end-home-speaker

Another vote for Rogers LS3/5a: crystal clear, transparent, made for small spaces where they shine like no other.

Dynaudio Special 25, Joseph Audio Pulsars, any awesome Sonus Faber 2-way: Electa Amator, Guareni...

I recently purchased a used pair of Joseph Audio Pulsars and added a small subwoofer for a small room. Sounds pretty good to me. 

Trenner & Friedl Arts.
Small box, big sound. Get a used pair as the new model is $6000.

My current favorite speaker TAD ME-1 small stand mount with a big sound.

Ilumnia Vocalis

I have Focal Aria 926 speakers in a small room and they sound wonderful driven by two Schiit Vidar Monoblocks and a Mytek Brooklyn DAC+ / PreAmp.  They will not overwhelm a small space but retain excellent detail, transparency, and fast response while remaining very neutral and not bass heavy (I find key for something like a small guest bedroom or study that is close to other bedrooms).  All recommendations made thus far are great options, it comes down to your actual space, purpose, preference and parameters/limitations.  Happy hunting!

@yyzsantabarbara I have Focal Electra 1028 Be speakers in my primary listening system in a large room (20' x 30') and could not imagine them in a smaller space.  The Kanto is the replacement for the Electra, so I would expect a similar performance/price ratio.

Pulsars, but look at the Usher lineup. Oh, Living Voice too.

Quads are a great idea! The speakers serviced by Kent in KC are supposed to be great. A friend is using stacked quads like this and he has had everything (even IRS)  original Apogees, Dali Megaline etc. He uses the Spec Gear from Japan and loves them (see Jeff Day’s Blog) with his Quads.
Where are you in Southern California?

Wilson Duet is my easy first choice 

Ryan s610's.  Heard them at a show - amazing.

I have a room about the same size as you do and the Legacy Audio Studio HD's work GREAT....I actually have compared the Legacy to KEF and the Paradigm bookshelf speakers and found the Legacy performed much better. The Legacy are some what heavier (about 32LBS ea) then most other bookshelf speakers that I have looked at. Frequency range is listed at 41-30k, with 91 db. This is a 4 Ohm speaker which can be order in multiple high grade finishes and it won't " break the bank " while doing so.   

If a pair ever becomes available, a pair of Sonus Faber Extrema's, with the oval sub in the rear, on the matching stands. Magical, with the proper amplification. And this, from a horn aficionado. Enjoy ! MrD.

@daveyf Unfortunately the Stenheim monitors were on Bryston gear which wasn't a very good combo for my taste- not much bass either, but I could be jaded by the Five demo I had prior. The line has very nice tonality and dynamics.

I think the Gamut Rs3 might be the ticket for you though too

@keithr  I think the little Gamut Rs3's are interesting, although i suspect they would NOT be a good match with my tube amps. A friend used to own the larger floorstanding model, it was a bear to drive and required a hefty ss amp. 
The Stenheim's seemed to me, at least in Long Beach, to be a little soft on top and diffuse in their imaging capabilities ( slightly). I am not sure I am a fan of a squared off metal cabinet...for this reason. 

I heard the Gamut's under less than ideal show conditions last year at the Capital Audio Fest, and thought they were fabulous.  For me, best stand-mount sound at the show.  That being said, I seem to remember that there was some pretty impressive equipment upstream from them.

I love my Harbeth C7es3.  They sound fantastic in my small living room! 

Me too love harbeth M30.1 in 10x11 room.
try to look something different with better bass .

Size of room is one thing, but how close are you sitting to the speakers? How far are the speakers from the wall behind them? Ported speakers don’t perform well in small rooms, so you might want to try plugging the ports if equipped and plugging is supported. I’d recommend near field monitors. Yamaha makes very nice near field monitors - HS5 and HS8 with an available active subwoofer with crossover. 

I have a pair of Charney Audio Companion Voxativ AF 2.6  in my 11x15x8 room. They will play very well in the 11x13 room your considering. Charney offers 3 different looks for the Companion and many different drivers to suit your taste, budget, and gear. Don't let the small size fool you these are serious speakers that deliver it all especially deep clean multi note bass. Do a search there are a few very positive comments from owners and show attendees around the web.

http://charneyaudio.com/

The earlier mentioned Klipsch Heresy + dual JL Audio Fathom F112S sounds like a dynamite combo for a smaller room. I would venture into a different scenario with a pair of OMA Monitor’s and augment them with a pair of DIY limike’s PicoWrecker tapped horn subs. While those tapped horns aren’t small they’re rather slim (though tall), and should be placed in the corners flanking the Monitor’s. The PW's should hold their own against most any commercial subwoofer offering, but tapped horns just sound different (i.e.: better) to my ears compared to direct radiators. 

https://www.avsforum.com/forum/155-diy-speakers-subs/1654961-lilmike-s-picowrecker.html

Forget about notions of "overkill" here; it’s an approximation to sufficient headroom, and well-integrated this setup would be a seriously musical, versatile and dynamically uninhibited. 

Alternatively, and somewhat cheaper, I'd recommend the JBL 4429 as mains, still in tandem with a pair of PicoWreckers.  

I would also recommend the Aerial 5t’s. Best small speakers I’ve heard.

Because you are talking about such options as stacked Quads, I take it you are not limiting your selection to tiny speakers for the tiny room.  One of the better stacked quad setup I heard, that comes with an active crossover and dedicated EL34 amps for biamplification, is assembled by a firm named Emia.  The system is big, and can play at shockingly high volume level, and I liked what I heard in a tiny hotel room at a show.  It is not a Quad with more volume capability, so, you do have to hear it even if you generally like the sound of Quads.

The recommendation of Charney speakers is dead on.  They are amazing sounding, and work with the very low-powered tube amps which are the type of amplification I prefer (they are over 100 db/w efficient).  The model I particularly liked had the AER driver and cost something like $18k.  It is a plus that their systems are relatively compact.

You could also be a candidate for custom-made speakers.  Look up Deja Vu West (San Diego).  It is a store affiliated with Deja Vu Audio (Northern Virginia) that builds its own speakers out of vintage and new drivers.  Most of their systems are particularly suited for smaller rooms and can be tailored to match your circumstances.  The price range for custom systems is very broad, but most are in the $30k to $80k range.  

I also encourage you to add  the Joseph Audio Pulsars to your  audition list. I heard them at "The
Show" in Oakland CA last year. I was mightily impressed!

If you like pulsars, go call lsa..underwood hi fi. LSA bookshelves are as good as pulsars, much lower price!!!!