I'm currently running a 5.1 setup with M60's for the front's with a VP150 for the center. I've also got a pair of QS8's on the sides. I've been thinking of adding a pair of M3 bookshelves to drive my back channels when I step up to 7.1

So my question is how do you like that setup? Do you feel that it really balances it out? Or do you think using QS4's might be a better way to go. Maybe we could start a poll: M3's vs. QS4's for the rear channels?