Your room isn't all that large. I'd hop down a notch to the M60's for your mains. I'd also start off with 5.1 and see how wow'd you are by that. The QS8's are awesome surround speakers. You may not feel the need for the extra two channels in the rear.

Those two changes will save you $770. Without a doubt, put that into a Hsu VTF-3 or STF-3 subwoofer.

You'll never leave your HT.