i'm going insane!!! Tax money is coming. My stuff, Yamaha RX-V496 AV Receiver, RC3II center, KLF20 mains, 2 crappy surrounds that are not really even surrounds, and a KSW 15 sub. My first upgrade will be a Denon 4802. The only other thing in this lame mess that i want to build around is the KLF 20's. Do i want full range speakers for my surrouds and back surrounds also what about the center and the sub?