Guidance please. Questions about running a Denon 3700h with power amp. Can I use a 3 channel amp and still use the AVR to control the subs and drive the surrounds? ...or do I need a 5 channel amp to power all the speakers in my surround system? Separate amp/s seem like a good way to go with AVRs at this price point. What would be some good amp' options with this AVR?....5.2