Hi Chris,
Great gear, great room, great music storage shelves!
It looks like you've mixed some RealTraps Mondo(?) by the left speaker with ASC Tube Traps by the middle of the front wall. What are you using, that looks like a diffusor, on the left wall? Any treatments behind the seating position or on the right wall?
I know at one point in time you were exploring bi-amping with your ML speakers. Like you, I have the same PX25 amp and when I met Joe Fratus of Art Audio at the Montreal stero show in April he said it'd be better to bi-amp with either another PX25 amp (although I wanted SS for the bass) or one other model of his amps (whose name escapes me now) so as to best match the two amp's sonic characteristics, impedance etc etc. Matching a SS amp with tubes would be dicey - different speed etc etc.
Isolation looks very important to you - have you heard of an interesting company called Minus-K? They are a scientific company that as a biproduct of their main work now offer audiophiles very impressing amp stands . . . just FYI.
Congrats again on a great looking system.