Hi all, in around 20 days we'll be moving into a house w/ a glorious media room. The sellers are leaving an epson 7500ub projector and 110" screen- score! Also, there are 6 surround speakers built into the wall w/ mesh covers (so I haven't been able to see what the model is yet). I have had a surround setup in my existing house for years, the traditional 5.1 variety. What I'm trying to understand is- are the 6 surround speakers in my new media room part of an incomplete 7.1 setup where I'll need to provide my own center channel and sub, or are the two front l/r supposed to account for a center channel as well? I would guess that may depend on the speaker type. I'm just throwing this out there for thoughts and suggestions so I have a better idea when I move in. I will happily plug in my own polk center channel and sub if need be, but if there's something I don't know about modern home theater design and implementation I'm happy and eager to learn from the pros here. Thanks!