>>My theater room setup is almost exactly like yours, except your width is about 5 or 6 feet shorter than mine (the measurement along the back wall).

Careful; Mark is a little sensitive about his room dimensions

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8