I have recently bought a Denon 1705 AV amplifier. I am using it with a pair of old Bang & Olufsen speaker cabinets, with 5 speakers in each. The AV amp is set for Virtual stereo, and the speakers are floor mounted and below my projector screen. I am very tempted to get a surround sound system, to use the AV amp fully. However, my seating position is flush to the wall opposite the screen. As the ideal position is equidistant from the front & rear speakers - would a surround system be a waste of money, or should I go for a pseudo 5.1, like the Yamaha YSP-1?