Oh, I should have looked at your system first. Now that I have, yes, try to hear the Playback Designs MPS-5. It'll be at the Rocky Mountain Audio Fest in the Soundings room. RMAF will be worth the trip because you can hear almost all the alternatives there.
BTW, there are one or two top CD/SACD players with tubes, but, IMHO, that's not what makes them great. As a Pass guy, you know that it's the design and not the pieces used.
I can't look at your room and say that you need to change anything. If you need diffusion, it'd be at the rear. Something to consider.
Dave