I've never really been interested in a 7.1 system until now that I'm builing my theater room and I'm thinking of building 7.1 capability in.

My question is, with a 7.1 setup, which set of surrounds are the MAIN surrounds..the sides or the rear? What I mean is..when I switch over to a 5.1 source, which ones will be the surrounds?

What I plan on doing is installing some inwalls for the side surrounds UNLESS they are the main surrounds.