Solid state amp that tube fan can be happy with?

I was also gonna recommend the Atmasphere GaN amp but didn’t as they are monoblocks, but they don’t take up more space than your average stereo amp, and as Ralph mentioned above they can even be stacked.  They offer a generous trial period, and you have to think there’s something to a distinguished tube amp designer being very happy with his GaN amp.  I’d be strongly inclined to at least try them if I was you. 

This Van Alstine amp is worth a look, and they offer a 30-day trial period.  Best of luck. 
 

https://avahifi.com/products/dva-set-500-stereo-power-amplifier

What’s your budget, and are you looking for new or used?  Does it need to to be balanced?