I have a question for those who have upgraded from 5.1 to 7.1 with a similar speaker setup: Axiom M80's front, VP150 center, and Qs8's rear. I currently have the M80's biamped using a Denon 3808. If I go to 7.1, I'll loose the bi-amping on the M80's, which I feel improved the sound quality. Would upgrading to 7.1 be worth loosing this feature, and would the sound be that much better? Thanks for anyone who could provide some input.