I guess I'll add a bit more. After a month or so, I think I've got them set up pretty well. The sound is perfection- not "ruthlessly revealing" - just "ruthlessly perfect". All sources- cds, dvds, tv sound, sound as natural and easy as I've ever heard. No "Hi-fi-ish" emphasis anywhere- the sound just flows out with consummate ease. All the usual 'phile categories that you've mentioned- imaging, integration, soundstaging are as good as it gets, but the effect transcends those categories. The highs are detailed, extended, and airy, yet totally without grain- they are all there, but without emphasis- the very best I've heard. I can say the same for the mids and bass. Totally musical, with no nasties. I was listening late last night at low volumes and marvelled again at just how totally right they sound- as believable as 2 ch sound gets.
If I really concentrate on it, it seems sometimes that the midbass isn't quite as fast as the lower mids. Of course boundary effects are very present in that range so with better room placement that could well go away (I'm stuck with close rear wall placement). In any case the effect is so slight that I have to work hard to find it- and when listening to these, the last thing I want to do is work hard- I just want to enjoy the music.
I own the "C" model with a little Carver sub, x'd over at 30 hz., 36 db/octave. The Carver is adequate used in that way, and blends pretty well, but over 95-100 db it starts to double and then all bets are off. I'm not a head banger so it works out ok for me.
I use it only because of space constraints- I've owned 3 VMPS subs and they are much better- deeper and tighter, with excellent pitch and harmonic definition. I coined a term- "low bass imaging" to describe the sound of my last VMPS NOS. That sub was a close match tonally to the bass of the Wilson Grand Slamm (although it did not go quite as deep) which is considered to be one of the best low bass units ever, and the best I've heard in a properly set up and matched environment.
I think any sub you use must have a very low xover point- 40 hz. or lower, and a steep slope to avoid midbass coloration.