What do you guys think of the Axiom QS8 for the back surrounds? I've heard many opinions about what is best for backs, direct/bi-pole/di-pole/quadpole. Most people prefer direct, but when I did a home theatre wizard on their site for a 7.1 system, they recommended four QS8's. I'm not able to place surrounds to my side, only on the back. Does anyone use the QS8's as surround backs and how do they perform?