Here's a list of gear I'm considering putting together for my setup:
pre-amp: Onkyo PR-SC5509 pre-amp http://www.us.onkyo.com/model.cfm?m=PR-SC5509&class=Preamplifier&p=i
amps: 2x Onkyo PA-MC5500 http://www.us.onkyo.com/model.cfm?m=PA-MC5500&class=Amplifier&p=i
center - http://www.klipsch.com/R-5800-W-II
l/r - http://www.klipsch.com/kl-6504-thx-in-wall-speaker
ceiling - http://www.klipsch.com/CDT-5800-C-II (for rear / surround and zones 2/3)
sub - http://www.klipsch.com/rw-5802-in-wall-subwoofer
I'm planning on doing 7.1, and doubling up for the sub to use all 9 channels on one of the amps, and using 8 of the 9 channels on the other amp for the 8 speakers in the other two zones. I am space limited in terms of what I can use for surrounds and rear - I don't have walls for both sides or the back, so I intend to use the ceiling speakers. Any thoughts on whether or not this is a good idea? I intend to primarily use the setup for watching blu-rays (and ripped br/dvd media) and obviously the other zones are just for listening to music / radio.