I have a Denon AVR 2106 7.1 reciever, a 43" Pioneer Plasma,and a Sony DVD/VCR slp d300p in a 15'x 20' room. The room a wired for surround sound. My problem is I have limited space for a center speaker ,which from what I understand is the most important speaker. The only space is above the Plasma. The speaker can be any width but no more than 4 5/16" high and 4 7/8" deep and has to be white. I also need suggestions on the smallest size in wall speakers that would be compatable with the center speaker. I bought 2 pair of POLK RC85i speakers but my wife wants smaller dimensions. Finally,I'll need a reommendation for a subwoofer. Please advise on makes and models. If anyone needs a new set of POLK speakers let me know!