I'm a new home owner with a passion for home theater but don't know were to start. My room is in the basement 9'6"W 17'10" L & 7'8" H. The rear, left & front wall are concreat, the right wall needs to be framed. I and Planing to use a 6x2 with staggered studs with some sort of insalation. My speakers are Infinity RS5' for the front, cc3 center D box 12" sub & RS2 for the rears (11"D 13"H 8"D.)To keep costs down I would like to keep my existing speakers. I also would like to upgrade to a 6.1 but the room is so small and my rears so large I'm not sure if it would make an diffrence I am planing to get a projector but don't know how big a screen to get with that size a room. useing the 5ths rule for speaker placement Maybe 69" or so? Any recomondations would be great.