I have a room with the following dimensions 12'(L) x 15'(W) x 8'(H). The TV (47" Rear Projection) and speakers connections (Room is pre-wired for Home Theater) are located on one of the 15'walls. I need to place the sofa against the other 15' wall to get at least 8' of viewing distance for my TV. I want to setup a 6.1 or 7.1 Home Theater, but I have a concern on the dimensions of my room and where to place the rear surround speakers (channels 4,5,6, & 7) since the sofa is against the wall. Basically, my question is what will work in my situation a 6.1 or 7.1 setup? or stay with a 5.1 setup? Also, I already have two (2) 8" Subwoofers, but will be purchasing the rest of the speakers from Axiom Audio, as well as a new receiver and DVD player (I need advice on this also). Please help me with what would be the best setup for my room. Thank You.