I've been out of the loop for a couple years enjoying my Harbeth C7s with a pair of Joule 18w SET monos. My tastes have shifted and I'm looking for a solid state amp for the setup. System is vinyl only with Herron tube pre and phono.
Ric Schultz at EVS is getting ready to release a new amp of his own design. A 25w pure class A, ss (50w @ 4 ohm). Don't know exactly when it's due out, but it should be killer. $2500 Details on his site.
If you're prepared to be patient & stretch just a little, i'd vote for a 2nd hand McCormack DNA-500. Good examples can be found found circa $3k. The DNA-500 sounds tube-like and is musical sounding, and will also have enough power to drive pretty much any speaker you might throw at it in future. They don't last long when they come up on the 'Gon & there is a good reason for that; they are a really nicely designed & built amp & a flat out bargain for their asking price.
There is a CODA amplifier 20 on audiogon right now and Reno Hi-Fi (http://www.renohifi.com/PassUsed/PassUsedInStock.htm) currently lists a x250 and offers a 1 year warranty both are within your budget. No Association with either seller.
There is a conrad johnson mf2275 currently listed on audiogon.
Any of these amps would work well with your Herron Phono Stage.
The Joules are a bit too lush for me these days. I'm looking for something more dynamic. Been playing guitar a lot so I'm wanting a tiny bit more of a studio sound. Just leaning over to that side some, although maybe some ATC Active Speakers are in my long term future.
Maybe a Class A solid state amp would get you what you're looking for without losing too much tonality or fluidity. There's a Plinius SA103 and Pass Labs XA100.5s for sale here that might be worth a look. Or maybe a McCormack DNA 500 or a hybrid like a Rogue Medusa, although you might need to change the input tubes to get the right tonal balance as stock tubes may leave you a little cold. Just some ideas, but best of luck.
Ah crap. Forgot about price limit. Except for the Medusa used I need to downgrade my recommendations. There's a Plinius SA102 for sale in your price range and a McCormack DNA250 a bit lower. Got nothing for Pass, but Reno HiFi is offering an intro discount for the new First Watt F6 that's in your price range and you can demo. Sorry for the brain fart.
Parasound A21 works very well with my class A tube pre . It responds to just about everything I through at it . Power cords, i/cs , fuses and spkr cables. I am now getting almost ridiculously good sound from my system. I am sure many of the others mentioned are quite good. I just wanted to give you my experience with the Parasound . Hope all works out for you.
A fellow audiophile and friend has a set of Harbeth 40.1s and now uses an Emotive XPA-2 stereo amp; definitely meets your price criteria. It has pits of hell bass, great high frequency and midrange response and drove the Harbeths without breaking a sweat. I was shocked at what Emotiva had packed into this fine amp. Another friend of ours swore by the monoblock versions of the same amp.....
Musical Design t100 entry level and in time you can upgrade it to the ultra elite. this little gem beat out my Parasound a21, and I use it to drive my Vienna Acoustics Mozart Grand's and it doesn't break a sweat!
They are fantastic. I am getting exactly what I wanted... still 97% of the sweetness of the SET amps with way more dynamics and no fuss! I never thought that would matter but it's nice to not have to worry about the amps the way you do with tube amps.