You Mentioned reflections. I like the idea of the Revel M126 with matching stands. They are really good with reflection due to the tweeter 5th gen wave guide, they have some very nice finishes, and they sound good with the Hegel series. 
Another option is the KEF R3 or R3 meta with a Nordost Heimdall speaker cable. It good for reflection, great for off axis, and it comes in nice finishes. 
last would be the Dali Minuet SE. it can be mounted on the wall, put on a shelf, or on a stand because it was designed to be within 8” off the wall do to the 45 degree angle port design. It only comes in burned walnut. It basically a Dali Micro KORE. I would use a speaker cable without silver. I would even try the $40 Micca speaker cables on Amazon. Yes I own/ use them on my second system. 
I know these are common brands but I have actually had experience with these combos. I hope his helped out today. 

@wsrrsw     Johnnie Taylor

If you want to try an excellent sounding bookshelf speaker that can be had used for under $500 a pair, I would recommend the KEF Reference Series 101. It's very well made and similar in design to an early Rogers LS3/5A. It even uses the same drivers but with a different crossover. If you don’t like them you could probably sell them for what you paid.

@renosteve

What’s your budget? What speakers do you currently have?

The PS Audio FR-5’s are fairly inexpensive and the Borreson M1’s are not. Help us give better advice.

Borresen M1 should do nicely

If you are looking at true high end, look no further than the Sonus Faber Guarneri. They are the best sounding bookshelves I've ever heard. I shopped extensively when I bought my end game speakers. Sonus Faber should be at the top of everyone's list. I ended up with a pair of Serafinos. Outstanding engineering and the most beautiful speakers available at any price point.

Motion Audio 100 bookshelfs have a wide frequency and can go deep without the need of a sub.

@renosteve I think @macg19 makes a good point, not only about Harbeth, but other bass-capable stand-mount, or bookshelf speakers, their in-room response betters their specs, and the Harbeths are easy to drive— a desirable quality. 
​​​​​​@yoyoyaya Mentions floor-standers, which I favor, and which also don’t take up any more floor space than stand-mounts, and supposedly deliver better bass response than stand-mounts; the argument for stand-mounts is that they offer greater flexibility in managing room modes generated by the long standing waves of bass notes. With stand-mounts and a sub or two, you are much better able to tune the room. You have something in the toolbox the floorstander can’t duplicate. 
Another argument for stand-mounts is that they are reported to image well. 
 

Were I given the opportunity to start over in a room you describe, which closely resembles the temporary home of my system, I would go with stand-mounts and a relatively high-end sub (or two) that allowed for infinite phase adjustment. 
 

Final Note: In support of the stand-mount for the space, in my nearly square, five-doored, room with a large beam / ductwork splitting the ceiling reflections up, I find that a capable full-range floor-stander (B&W 801M Series 2; front-ported, 12” woofer, separate mid/tweeter enclosure) is a little ‘big’ for the space; compared to a vintage full-range ‘bookshelf’ (Warfedale W70E; 15” woofer, 5” mid, Mylar tweeter) in the same space. The B&W has a fuller, meatier tone (or timbre), but feels a bit constrained and not ‘good.’ I think more space would allow them to open up. The Warfedales image wonderfully, and the 15” woofer digs just a bit deeper than the B&W but lacks the B&W’s ‘slam.’

@OP - Do you need to put the speakers on an actual bookshelf? The room isn't that small so unless there is no floorspace, you could look at floorstanders too.

Audionote, the smaller less expensive 2 ways, I think K's. I had same issue. You can put them on a set of iso acoustic mini pucks on a cradenza or bookshelf against wall, vertical or horizontal and sit 6-7 feet away. Or, of course, stands. That makes best use of room.

Because you still haven’t mentioned your budget!

You guys are all really encouraging, for 45 years I'm pretty much stuck. I'll just get a lock for the door to the dedicated listening space. In all seriousness, I'm curious why I didn't get the usual suspects when I asked about a high-end bookshelf speaker i.e. Sonus Faber, Dynaudio & Revel. Makes me wonder...

@aewarren Cheaper to Keep her Haven’t heard that tune in years.

PS Audio FR5 has my vote. No doubt. 

Cheaper to keep her.

Assuming divorce and murder are non-starters, may I suggest Harbeth 30.2 XDs.

-They are known to pair well with Hegel (I believe Harbeth shows their speakers with Hegel)

-I've compared them in my home (a large open plan space) next to my 40.3 XDs and it is really hard to wrap your head around how rich these speakers sound for their size (and comparative price, you could pick up a used pair in the US right now for around $4K)

-as advertised, they are easy to drive despite sensitivity of 86dB

-ignore the 50Hz bottom end, in a room they go way lower

-great near-field and not fatiguing  (6 ft apart and a couple of feet from side and back walls should be fine) 

Caveats:

-they do need proper stands IMO (Ton Trager or Resonant Woods)

-if loud classic or hard rock is your main genre look elsewhere; they excel with vocals (obviously), jazz, acoustic music and anything by Tom Petty (classified as rock I think but IMO his own genre and usually very high production values)    

...another view, from her side:

An older couple being interviewed about their long marriage, and how they got through the typical trials of such....

"Did either of you consider divorce at any time when the going 'got rough'?

He clammed up....She got thoughtful for a moment.....

"Divorce....no.  Murder....Yes"

OP, beware.... ;)

Robin Williams: 'Divorce is like ripping a man’s genitals out through his wallet’

Humm, hadn't thought of divorce as an option but think it might be a tad more expensive.

I think you answered your question.  TAD EVOLUTION. 

@soix in every thread you respond to, you are always helpful in trying to bring out more info from the OP in order to give better advice. But, man, you have a great sense of humor and had me rolling on the floor with your divorce humor in this particular thread. 😂

Thank you everyone for all the great references. Each one has its intriguing aspects, sound signature, size, timber, price point, etc. The small speaker world is completely new for me, just wish there was some way to actually listen to one. Perhaps I'll try an audio show soon. 

Best bookshelves I’ve owned and heard out of many are the Tyler Acoustics Taylo Ref monitors. They use the same Seas drivers as the non-graphene Joseph Audio speakers, along with top shelf crossovers. Tyler no longer lists them on his website but I don’t see why he couldn’t make a custom order pair since all the required parts remain available. 

https://tyleracoustics.com/

Audition Vivid S12.   Best bookshelf I have heard.  Clear, neutral timbre, fast, dynamic, easy to place, decent bass for a bookshelf.  Google and read pro reviews.  

Humm, hadn't thought of divorce as an option but think it might be a tad more expensive.

A long time ago Howard Stern, who had gone through a divorce himself, was interviewing Chuck Norris about his pricey divorce and gave him this advice — “You know why divorce is so expensive?  Because it’s worth it!”  

after the divorce you will be free to do whatever you wish with the money you won't have (the lawyers will spend it)

Humm, hadn't thought of divorce as an option but think it might be a tad more expensive.

@ OP -- If you are looking for the realistic natural sound and the speaker that reproduces the original music, check below information.

Say "hello" repeat with below spkrs sounds and try hear your voice and speaker sound together.

When you listen a audio system at the show and people talk a lot and you want to say "please shut off. Let me listen to the music." Right. Human can’t listen to a human voice (natural sound) and audio music (electronic sound = un-natural sound) together.

People go to a live band cafe and enjoy the live music and hear friend’s voice together without any problem.

Now say "Hello" repeat with below spkr sound and try hear your voice and speaker sound together.

This speaker sounds like a real human voice and you should look for the speaker sounds like this. Alex/WTA

I'm so in love with Fritz's Carbon 7 Mk2 SE that's what I'd try to make work, but it really depends on your tastes.

I’ll echo others — what speakers do you have now, what sound characteristics are you looking for, what’s your budget, and are you looking for new or used? Need more to go on here.  Also, is divorce an option?  That could potentially solve all your problems.  Heh heh.

Sorry errant keystroke. I was referring to room reflections, 

Omega speakers, or maybe Tekton monitor impact.

Fritz makes excellent high end sounding speakers that are super easy to drive.

Joseph Audio Pulsar are outstanding

Best/only real way to know is to try to get a dealer to let you audition them in your home. Otherwise it will always be a guessing game to some extent, depending on how much you pay attention to measurements. 

Budget? New or used?

What were some of your past speakers ?   

Have you set up current speakers in new room yet?   What qualities did your previous speakers lack that you are looking for ?