I'm upgrading my home theater system and would like some advice on components. I have an Onkyo TX-DS484 receiver and a Kenwood 4050B DVD player as my main components. My speakers are JBL mains,Polk Audio CS245I center channel, Acoustic Research 215PS surrounds, and Polk Audio PS350 sub. I would like to keep the Polk Audio speakers and build around them.What would you suggest? I live in an apartment so space is a premium but without the sacrifice of sound quality.My TV is a 32" Sony Trinitron.