Rizzo, the epic 80-500 would be fantastic for that room. My basement HT room dimensions are similar and am just using basically a Epic Grand Master with HSU sub because I will wall mount the M22's.
Alan from Axiom suggested that setup to me(with EP500) back when I was asking and told me if I wanted to sometimes play music at "E-LEVEN" to go instead with the M80's.
The QS8's are great surrounds and in the future I may just put 1 or 2 M2's for rear speakers if I ever want 7.1 but I doubt I will even do that. 5.1 HT is enough for me.
