Currently I own a Harmankardon AV-320 receiver and I don't feel its built-in amp serves my M60 speakers nicely. So I'm looking at purchasing an high-end amplifier to drive them. But I'm confused by speaking to several people. I mainly want to use the amp to listen to music on the M60. Some people recommend connect a separetae CD/DVD player directly into the amp, by-passing the receiver. They say if I use the pre-outs on the receiver, it will beat the purpose of getting an expensive amp. Is it true? I usually hear preamp always go with amp. What's the the different between preamp and receiver? What's the best way for me to connect the new amplifier?