Sorry to ask this question but nothing came up from a search. I have a nice old Nakamichi with 5.1 analog inputs and a pro logic processor. I’m considering purchasing the Denon 2900 to both add a better DVD with 5.1 digital & DVD Audio. I’m also upgrading my rear surrounds at the same time. The Problem: Eventually I’d like to upgrade to 7.1. Currently my side surrounds are installed in the ceiling. My couch also sits about 1.5 feet away from the wall. So, to keep my rear surrounds at the same height as the side surrounds (per dolby website) I would need to install them in the ceiling also. Unfortunately this will place the rear channel almost directly above my head. The Questions: 1) Will this placement situation adequately reproduce the 6.1 / 7.1 soundtracks or would it be better just to stick with 5.1? 2)Due to the fact that I’m purchasing all 4 surround speakers now, can I hook them up to the 5.1 receiver to generate a larger / fuller 5.1 sound field? Any comments are greatly appreciated.