My current living room setup is 5.1 so I'm familar up to that point, but I haven't followed up on the current spec regarding 6.1 and even 7.1. I know a few movies have 6.1 available. And I've seen 7.1 mentioned on some receivers although I'm confused as to whether that's an actual DD or DTS spec. Should I bother with setting up for 6.1 or 7.1 in my new HT room in the basement, or just stick with 5.1? I plan on running the audio for a 7.1 placement*, but am undecided on if I'll actually bother with the 2 extra speakers for now. * If just doing 6.1, where does the 6th speaker go? Rear center? If 7.1, are the 2 extra rears spaced evenly apart from each other and the wall?