I am looking at starting a home theater in my basement. I already have a system with PS3, 52" LCD, and Kenwood HTIB surround sound. I would like to upgrade to a HD projector, motorized drop down screen, 5.1 receiver and in wall front speakers and in ceiling rear speakers. My budget is undecided, but I am thinking around $1500 or so for projector and screen and $1000 for receiver and speakers. And of course extras for wiring and diy construction. Am I missing anything? (amp, etc). Any suggestions on good products within this range. The room would be an open room in the basement, but the viewing area would be 20 x 20 (ish) and the window is easy to cover. Any thoughts would be greatly appreciated.