Since you selected the M22s instead of the M60s, I take it you're being budget conscious, right? Three M22s across the front would be great. The only place I'd disagree with your selections is using 4 QS4s in the back. It's generally a better idea to use direct radiatin speakers in the rear. For this reason the M2s are most often placed in the back. QS4s are perfect as side surrounds.