Pass....Accuphase....or......

I owned Pass, Accuphase, and Audio Research amplifiers and finally settled for the  Ypsilon Phaethon.

These are stellar sounding (harmonious, well defined and capable) amplifiers and their after sales device is incredibly good.

The amp has a discrete volume control with (I believe) 1bB steps.  I am perfectly happy with that, but this is a point of consideration. I own the “normal” version of the Phaethon whith a new price of around €. 18.000,-. 
 

I am confident the you will not regret trying one of these beauties before you make a final decision.

I have the Luxman MQ-88uC power amp. I got it used for about $3000, I changed to nos tubes. If you like a LUSH accurate amp try get one form Mucic Direct and try it out. It's 25 WPC and will easily drive 89 sensitivity . I have used it with Monitor audio, Triangle and KEF speakers. No issues,

@blue-magoo Man!....those Luxman MQ-88uC look good. And they seem to have a direct input that removes the level control from the circuit. Nice! What kind of speakers do you use with them?

I have a room your size, with Vandersteen 2CEs and Pass X150s. I would at least consider the 150 series, new or used. Capacity to drive with most of your listening in Class A. I heard a Cornwall IVs with low-watt tubes and I preferred my setup. 

+++++ Accuphase A48 great if not greatest <50W/ch SS A class amp! advantage: no maintenance needed for few decades! 

+++++ Luxman MQ-88uC lil less peak power headroom than A48, amazing dynamic range, very low noise floor for tubes, very gentle tubes use conditions to ensure long ride without replacing tubes etc.!