First of all, correct me if I'm wrong but the new Star Wars DVD (Ep456) set is in 6.1 (DD EX). And I believe the DVD for The Alamo was in 7.1.
Now I have hung an extra pair of speakers on my rear wall which is ~12 feet behind the sitting area and a total of ~25 feet away from fronts.
I don't find it to be something I'd call amazing, but sometimes it does add a touch of ambience since I have that wide open space behind the sitting aread.
Judging by my experiences in the past where I had no room behind the sitting area I'd have to agree that it prolly doesn't add much, esp since there isn't a lot of material specifically programed for it. For me its worth it, but like I said, its just a couple extra speakers I had that I figured I'd put to good use. I do like having them there but I could live without it as well.
