Currently I have a 5.1 set-up. My room is 35 feet long and I sit about 3 feet from the back wall. My QS8's are positioned on the back wall the same distance away from the outer wall as the M80's are, about 6 feet (my room is also 35 feet wide). Having a square room is a big dissadvantage I've been told. But the way it's set up now fills my entire living room with music on 5/7 channel playback for music no matter where you sit. I never used to like 5/7 channel playback with my last set of speakers, but with the Axioms it opens the music up so much its incredible!
I'm plannng on expanding this set-up to 7.1 & eventually even 9.1 (Denon recievers let you split the 6th & 7th channels into 4 speakers). Once I get my next pair of QS8's I will do a little more experimenting with placement. Didn't try these anywhere but the back wall, but I am quite happy with the sound I'm getting out of them where they are so no regrets.
