SS Amp Designer by Reputation

Second McCormack. DNA 1, and done. Why shotgun when you can nail a bulls-eye first try?

Assuming used is okay and you have been a tube guy. I'd look at SST Son of Ampzilla 2000. Pass has some models that x tube guys like. You didn't say how much power that you needed. I don't see a tube head liking any PS Audio all solid state amps, any affordable Krell, I could see you leaning towards an older Jeff Rowland.  One of the better old pure class A amps that are properly rebuild might work... Kinergetic KBA75?  

I owned a Rowland Concentra I for years, and thought it was outstanding. However, they are getting a bit old now, and the design is not independent-tech friendly, so re-capping, etc., could be expensive.

You definitely want to stay a way from older Krell amps Like the KMA and KSA series. They used an insufficient number of output devices and were under cooled. Many of them blew their output stages.
I am a Pass fan if you can find a decent unit for the money you plan on spending which is unfortunately not likely. You might find a used Sanders amp for that money and they are a great value if you like the sound which is more like the Boulder amps. If you could save up to $5000 you might find a pair of JC-1s which blow everyone away. McIntosh is always an option if you value reliability over everything. They have a very comfortable if slightly veiled sound quality.    

Try Parasound A21+ not A21