Hi Guys I will be installing my speakers in a dedicated HC room next week, if possible I would like to position the speakers in a 7.1 setup. My room is 15ft long by 8ft (garage conversion). My seating position will be 11ft into the room length. I intend to have a rear left and right (surround), whats the best position for the other two centre rear speakers (for 7.1)? Should I place the two centre rears above my seating position (2ft above ear) on the side walls pointing at me or in the ceiling firing down at me? Equipment already purchased B&W CWM500 two sets (two rear speakers and two centre speakers) Mainly watching plasma for Sky+ and Ellie 7ft electric screen with AE500 for movies. Other speakers are Denon 3803 B&W DM603 S3 (front) LCR60 (centre) Vibe Alpha 2 Sub Any advice is appreciated.