I'm curious and no insults intended here. Do you know what ohms law is? Do you know how electricity "works"?
If you knew anything about electronics you'd know that an AVR is a noisy peamp that's generally not very good.
You can get a pre-amp kit for about $20 bucks that would best the Denon or build a B1 buffer.
Things are not black white, yes no, like you think with electronics and audio. Using that one box store denon as a pre for Orion is a SIN IMHO....
A SIN
PS remember he couldn't tell the AB and Cinepro were the SAME AMP...