Popular new/used SS stereo power amps under $2500?


Not long ago I began putting together a hifi system (on paper), and with the help of members here, learned I was going about it the wrong way, so I took a step back, and started over.  Meant to keep this short.  Didn't happen. 

Just to say it upfront, I did do searches on the forum and on Google for new/used stereo power amps under $2500 and only found related threads like preamp and integrates.  There were also hundreds of hits, but none visible in the first pages.

About what I'm looking for, and why:  First, the amp is to power a set of Harbeth P3esr.  Sensitivity is low, 83, and they run at 6 ohms. Many have suggested a power amp of 100w/ch for the speaker, from those more familiar with them. I don't know how needed that power is, but it's relatively common for SS to be at or higher than that, so I see no harm it setting the min at 100w/ch.  Some seem to suggest that higher out put amps have some advantages with power reserve for bass or "hungry" speakers.  Their words, not mine! 

That said, any amp capable of meeting those specs or able to run the P3 is a suitable candidate.  The designer even has said on his own forums "any quality amp is just fine".  But let's face it, it's not that easy! Initially, I was scoping out Pass Labs, but those are lofty, worth it, but lofty.  Also, over the top for me. I decided to transfer some funds into the speakers instead that work very well for my room.  With so many amps out there that can potentially power those speakers, I think it's important to include specifically companies with outstanding product and customer support, so I can at least feel confident that if my used $2.5k amp (or less) can be serviced. Hence the reason for a popular amp, vs a limited run or a special. (parts!) 

I am not an experienced audiophile and likely many amps would work well for me, but would love some insight.  Everyone can appreciate a quality build with solid connectors and avoid problems if possible. 

I listen to everything: Electronica, guitar, country 80s/90s, pop, rock. So I guess that would mean a fast/agile amp for long hours. Warmth is good, too! But I know fast and warm are typically mutualy exclusive, I guess emphasis on speed based on the time spent on some of those genres. 

I don't need or want an amp that can "stomp". 

Amp needs:  6ohm.  100w/ch+. Able to power low sensitivity (83).  Can work well at lower volumes with these speakers. 

Sonic character:  agile, fast,..... If possible, warm and musical? Limited fatigue, emphasis on limited fatigue.   Class A is a plus. 

Use:  lower volumes, sometimes moderate, in my small apartment room after work. 

Listening time:  3-8 hours/day
 
Avoids:  limited productions, any amp that needs to be turned up to perform, poor or limited product/customer support, any amp with a short production life, "rare", known risky amps, etc. 

Set up will be:

Rack mounted (active cooling) 

Cambridge azure 851n (it's a start) 
Harbeth P3ESR
Good cables (?)
Power amp.... TBD
Maybe a CD player

Room:  12*12
Apartment

Some amps out there might be, but hoping to see more, are:
Bryston
Classe ca 2200
Parasound a21/23


128x128mplstereo
Plinius SA-250/SA-100 are great amps and you can enjoy them for a while, then have the upgraded to current specs by the former USA importer, and get a giant killer sound out of them. 
Stock they sound awesome with great midrange and fantastic bass. 
My early-model English Destiny sounds amazing and has had zero issues. You can look at my profile to see the associated gear I run with it.
arcam delta 120(100-300w bridged); warm fast and musical makes nad , cambridge and rotel sound ,thin bright or too polite .it has a sense of realism and bass extension that is scary .it's from the early 90's uk made about 300-500$ used in mint condition(3 buttons nothing to mess with you don't need costumer service).i've been using it 6 years now,i will never replace it .i used it with 84db b&w 686 it was amazing ,made them sound so big. now i'm using it with b&w dm580(91db) and ifi itube as a preamp set on 0 db gain since it's too loud set on 6db in a medium room .with the money you save you can get either the ifi itube 2 tube buffer/preamp or the  schiit loki eq (or both)any of them will make this gamble much safer so you can fine tune the tone and have better control without losing anything.wait !you have a 1000 left so maybe you can also get nice headphones (the nighthawks are 250 now!) ,nice headphone amp.... in my opinion it's much better than paying 2500 for a secondhand power amp it's too much unless it's pass labs that's a major leap .
Be wary of anyone who says: “don’t worry, this amp doesn’t need an inspection.”  If he won’t let you get one, ask if you can have a 7 day grace period (and get your inspection during that period). If he won’t do either, walk away!  Good luck.