QS8s "too far back" on the wall would still be much better side surrounds than anything in the ceiling.

Based on the discussion since you posted the new diagram, I think that diagram is the way to go (QS8s on the side wall mounted a bit further back than ideal, direct speakers on the back wall). It's what I would go with, anyways.

Last edited by bridgman; 04/17/11 04:20 PM.
M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8