I just bought the Rf-83 towers and the Rf-64 center. I am using my old Rf-3's for my surrounds and have not upgraded my sub. Right now I am using a Denon AVR 2802 to power everything. I love my new speakers but want to get the most out of them. I am more concerned with music than movies. What do you recommend I buy to get the most out of my new speakers? My budget is around $2,000 and I don't mind used equipment. My hardware knowledge is limited since I'm new to all this. Any advise on what I should buy to get the best musical experience would be greatly appreciated.