let's see if I can more clearly illustrate my living room floor plan. The room is 17x18 with another room opening up that makes it about 17x30, except for a 5ft wide wall in the middle.
Right now the TV is backed into a corner, but when I get new speakers I plan to put it against the 17ft wall which all windows by the way. This cuts down on glare. The TV is a Toshiba 57HX81 widescreen RPTV. Yes, it's big. Also on that wall is a 2.5ft wide audio rack that will stay there unless I want to buy all new video cables, and I don't. So I would estimate the speakers would be about 10ft apart and about 10ft from the couch. The screen of the TV is about 2ft from the wall, maybe a few inches more when backed all the way to the wall.
Keep in mind that is my current residence. Won't always be the case so my set up needs to be versatile. I have about $7000 of new furniture in the room. I would have to leave before my fiance' let me do me anything with that.