Tube amplifier upgrade suggestions welcome.

i'll just wait for mc to answer...

why ? he knows one answer, at best.
try any number of excellent tube amps by companies with long track records and support: Rogue, Quicksilver, Conrad Johnson, ARC, VTL, Decware, Bottlehead, VanAlstine.......the list is long, i would start w Quicksilver....

The Lore specs from the website:

• 98dB 1W@1m
• 8 Ohm impedance
• 30Hz-30kHz frequency response

So, let's say in the real world these speakers have 94dB sensitivity. You won't need a powerful amp to drive these, especially in that small room. You may have a larger room someday so a tube amp with a minimum of 25wpc will do.
 
You could start by looking through the Audiogon classifieds for a lightly used amp. With a $2000 budget you'll find a larger selection if you go used.

Decware 

Would you consider a used Raven Nighthawk integrated to be a better move than buying, say, the Parasound A23+ new and using my m2si as a preamp?  This is kind of where I'm at decision-wise. 

I ask this particularly as I have (supposedly) very high sensitivity speakers and right now I'd rather have fewer watts that sound better than the other way around. 

A long time ago I had a much better audio system and I know I'm missing a lot when I play recordings that I know really well.  For instance, on Holly Cole's train song I know the person doing all the funny percussion effects moves around the soundstage from right to left and front to back and you can clearly hear that on a good system. 

I miss that level of clarity.  Everything is kind of scrunched up and fuzzy right now, sound wise.  Can I fix that at least partly without spending over $2K? 

Right now I am running Roon to a Chord Mojo, the m2si, and then to the Tektons which I really like.  I really like the Mojo too, actually, so it's the m2si that seems to be the weak link.

@tomic601

why ? he knows one answer, at best.

aww you’re ruining the fun 🤭

Upon study, it seems I am looking for something like a First Watt amp but you don't see them for sale very often and not at my price level.  I had a Linn LK280 some years ago and that was a great amp but it ran so hot it burned the boards which is what keeps me from buying a used Klout. 

I think like 10 watts class A used or the like is what I want, used.

Would you consider a used Raven Nighthawk integrated to be a better move than buying, say, the Parasound A23+ new and using my m2si as a preamp?  

A tube integrated would be a better way to go than using the MF as a preamp.
Raven builds highly regarded components, you should check user reviews of that amp.
I second adding  Quicksilver and Decware to your list.

I'd love a Raven but that's out of my budget and I don't see any used models available, unfortunately.

You are saying I'd be better off buying a tube integrated than using my m2si as a preamp and buying a tube amplifier to add to it?  I was thinking at least that would get me into separates for later upgrading and I'd not have to count out the m2si entirely.

Would you consider a used Raven Nighthawk integrated to be a better move than buying, say, the Parasound A23+ new and using my m2si as a preamp? This is kind of where I'm at decision-wise.  

My answer to this question was to stay all tubes and not  buy a Parasound.

Separates is a great way to go.
Use the m2si and find a used tube power amp. Quicksilver comes up for sale pretty often.

A rebuilt Dynaco by Will Vincent is a great amp. It has that classic tube sound.
https://www.audiogon.com/listings/lisa2a90-dynaco-un-limited-by-will-vincent-mondorf-caps-tube

A very highly regarded amp...
https://www.audiogon.com/listings/lisa8h87-music-reference-rm-10-mkii-tube

I would consider a tube integrated. Quicksilver and Raven are great options having a true tube preamp stage. Some integrated amplifiers have passive volume control. The Line Magnetic and Pass Labs integrateds represent the passive type. Both highly regarded. 

Check out Black Ice tube amps (Jolida) as they're underrated gems...I used a Jolida 502P power amp for years and it was a very powerful and clean tube bargain...and you can call the Jolida/Black Ice guys with questions...either an integrated or power amp will be within your budget.

Ok, thanks guys!  I know very little about tube amps but I have super high efficiency speakers and I think I'd like tubes -- we'll see!  :D  I do believe the smartest thing for me to do is to go used and trust what you, the experts, say is a great buy so that's what I'll do. 

I'm still leaning towards just an amplifier rather than an integrated because it will give me a better upgrade path, so I'm considering either of the two on Audiogon posted above. Thanks to @lowrider57 for the help!

I'm not sure I can afford one of these until the next round of stimulus money comes.  But maybe I can.  Not sure yet.  If I don't get one of the ones listed now can I come back and ask about other tube amps that might show up here or on other sites?  

Of course you can keep this thread going. I'll second Jolida, aka Black Ice as a possible amp for you.

I recommend you message the seller of the RM-10 and make inquiries, he's the original owner.  Ask to see more pics. I expect this amp to sell quickly, they don't come up for sale very often.
http://www.ramlabs-musicreference.com/rm10mk2.html

Will Vincent regularly posts his restored Dynaco's.

Thanks!  What would I be looking for in the pics?  I kinda know what to look for in a solid-state amp because my old Linn LK280 had major heat issues over it's lifetime, like the traces were coming off the PC board and caps were failing.  What do I look out for in a used tube amp?

Use your M-F for a pre-amp and get a pair of Quicksilver Mid Monos. You will be very happy.

Mid Mono Amplifier – Quicksilver Audio

shawn, the seller seems to have provided good CU pics of the amp. It’s very clean and he states it’s only 3 years old. Not much wear happens in that short amount of time except for tube life.

The questions I have are answered on the Music Reference website including:

Tube Complement:
2 Matched Pair 6BQ5/EL84;
2-12AX7

"Each unit is hand wired with point-to-point wiring."

EL84 is a very smooth, sweet sounding power tube. 12AX7’s are the input tubes and are widely used and not too expensive.
P to P wiring is preferred over using circuit boards.

I would ask how many hours are on the tubes, will they need replacing soon, is there a user manual, is there any transformer hum? (Some tube amps have a low-level hum that does not come through the speakers. It’s in their design). Ask if you can speak on the phone since it’s your first tube amp.
It’s a good price, probably because of the chip in the wood body. Definitely not a deal breaker.

I see your m2si has preamp outputs, so you're ok with just about any tube power amp.

I’d look at a second hand Leben integrated

I won't mention Prima Luna products - it starts an infantile chest puffing, pissing contest and your thread will be deleted. 

OK, so the Music Reference RM-10 sure looks like what might like and checks out so far, but is $1800 a good price, including shipping?

Rogue Audio Cronus Magnum III.  Sacrifice a tiny amount of transparency and refinement for much more dynamics and impact.  
can achieve world class sound with small signal NOS tubes.  

Shawn, did you talk to the seller? Make an offer.

Last year a rebuilt RM-10 sold for $1700 and a recent unit sold for $1850.
https://www.hifishark.com/search?q=music+reference+rm-10

I just purchased the RM-10. Hopefully it’s 35 watts of pure bliss. Thank you to everyone here for your feedback and help.

It will be interesting trying out a tube amp. Many years ago I had a VK-5i preamp but I never thought it had any sort of a "tube" sound. However I did agree with one reviewer I read who said it was a bit "dark".

If asked today I could never explain to anyone what "dark" meant but it is the word I’d use looking back on the sound -- not in a bad way, just the particular coloration it gave to the music. It was clear as a bell though. I bought it via Audiogon about 25 years ago, back when Audiogon was young like me. ha!

Thanks again and I’ll post my impressions when I get the new toy. :D  Special thanks to @lowrider57 for your expertise.

Shawn

Well done. Best of luck.

2K gets you into amazing used Manley Mahi Mahi mono blocks.  EL 84 based, these rock out with 40wpc and changeable modes for triode.  You can vary the timbre of the amp with small switches.

They tube roll well and mine were very reliable and stable.  They are quick and delivered solid bass.  Lots of fun for 5 years.

I'm getting a sporadic scratchiness from the left channel of the RM-10.  I'm guessing I need to try replacing some of the tubes to see which one is the problem?  Anyone want to give some tube replacement advice for this amp? 

The amp itself sounds wonderful but I'm breaking in some new cables now and still trying to re-EQ my room, so I won't comment totally until everything gets in place and worn in.  So far it's clear is can be and with better cables I'm getting some decent bass now.  You never know how good your speakers are until you give them a good signal though.

Thank you to everyone who commented and offered advice -- I read it all but I could only afford one amp so I went with this one.  I did get exactly what I wanted though in 30 great watts instead of 200 so-so amps.   Thanks again to everyone for your help.  I feel like I have achieved entry-level audiophile status now.  :D

Listening to Steve Gadd Band right now -- linked to this from Michael Landau's Liquid Quartet Live on Roon radio.  Both really good.

Damn, there's that scratch again!

could be a number of things but first thing i would do is swap the small signal tubes side to side to try to isolate the offending one...

Will do, thank you.

good advice and a fantastic amp designed and built by a true audio engineering genius and music lover Roger Modjeski.

great advice on swapping tubes. RAM tubes is the place to go, Roger was also an innovator on computer testing of tubes, matching / grading. His designs feature thousands of hours of operating life. I have his breakthrough RM-9 but you have an incredible amp in the RM-10.

make sure your input cables are not creating the scratch you hear, tight clean connections. There is factory help and tube sales for your amp and a cadre of techs at former MR dealers to help also.

reach out if needed.

finally, the RM-10 is highly desirable, so if it doesn’t work for you, easy resale.

Tony at tubeaudiostore should be able to help you

Oh, I won't be selling this beauty.  Just need to fix a scratch and tweak a few things.

absolutely x2 Tony at tubeaudiostore.  I've owned a RM10 since 2011 enjoy.