Rotel amp, Denon Processor.

[elninoloco7]

I have ordered a Rotel RMB-1075 and i should get it tuesday of next week. My current set-up is, Denon 2307 (as a processor when i get the amp), RF-82, RB-51, RS-42, RC-52, and a pair of JBL 400watt RMS subs. I am running a 7.2 (or 7.1 w/e i have 2 subs). However the amp is a 5 channel amp. I was originally going to wire the center, fronts, and side rears to the rotel, and the surround back to the denon receiver. Would ya'll recommend another way in wiring it, and will i hear that much of a difference as far as having 2 speakers hooked up to the receiver and the rest to the amp? Also if i did wire 2 speakers to the receiver and the rest to the amp, would there be some sort of delay because the speakers are coming from different amps? ... Or would ya'll recommend purchasing a 2 channel amp? (i really didnt want to get another external amp unless if i would here a difference)