As stated in the title I have purchased the Optoma ES520 from Dabs and already have a PS3. I want to turn my spare room into an all purpose cinema room. I live in a flat so the volume of the speakers are of little concern because my wife wont let me turn them up very much anyway!!! I know the projector will not play the PS3 in HD but I would like to find a low cost 5.1 home cinema system with DIVX playback via usb which will let me use everything via the surround sound. Would it be cheaper to buy the DVD player and speakers seperately?