Eric,
That is one fine setup you've got there. It looks great to me. The QS placement should work well as they look like you have centered them to the seating area of the room. I agree that you could pull the mains a little more into the room (and adjust distances accordingly in your pre/receiver), but it wouldn't need to be very far, maybe 8-12 inches or so? Just try it as suggested and do whatever sounds best. I think you've got the center oriented the right way, but maybe prop something small under the back edge to aim it slightly down at the listeners ears. Maybe you already have done this as it is hard to tell from the photos. I'm sure it sounds great as is, all the other tweaking is best done over time anyway.
Enjoy and thanks for sharing the great photos.
