Welcome NuSkooler.

I'd upgrade the QS4s to QS8s if it were me, better range and power for only a moderate increase in $.....Why are the Q's in your diagram both on the side wall? is that assuming 7.1 with two on the cutaway side?

Denon or the new Onkyos seem to be the preferred choice of receivers here, generally.

Half of communication is listening. You can't listen with your mouth.