I thought I would continue the discussion of the tri-amp/bi-amp situation here, since it regards your system and your setup "philosophy" for playback.
For those of you who wondered where this discussion started, I put a question to SH in the "200 Feedback" area of the Saloon, under "Found this on Audiogon." Since my question was off the topic of that thread, I jumped here to continue.
Not considering the subwoofers, you are essentially running a bi-amp system for your front three. I could not tell by the pics at your studio web page, are your mains or center channel speakers three-way? If so, is a passive, speaker-level crossover handling the split between mids and highs? Are you 'happy,' or at least 'satisfied,' with that?
As always, good to have a discussion with you! (To put a small twist on a common phrase, the announcer bellows: "Are you ready to R A M B L E?" At least our rambling may help a few folks, eh?)