Shivas,
despite the S.O. bass issues, one thing you may wish to consider is purchasing the EP 500 in place of a second pair of QS8s. Your room size would be an important factor in that decision though....if you've got a lot of room behind you and to the sides, 7.1 might not be a bad idea. If you have significant room volume overall, the sub might be the better choice.


"Chickens don't clap."