I have a decent system for my income level, LSi Polks, SVS with Samsom Amp, B&K AVR 507 Receiver, 51 HD Sony. The only thing i have that is cheap is my DVD player, its a cheap Zenith progressive scan. I am interested in spending around 500 or maybe a little more for something nicer. My question is what am i really going to see a difference in. My picture seems perfect now with this cheapy, I have no chroma problem and my sound rocks. Can someone tell me the addvantages to something more expensive?