Well, I pulled the trigger and ordered a new AVR-4520CI a few minutes ago. Thanks for the various responses and for tolerating the diversion from the main thread while I figured out what my strategy should be.
To help others that might be considering purchasing an AVR-4520CI, I suggest that you call around and negotiate. While most authorized internet retailers stuck with MSRP, there were a few that were willing to negotiate a modest discount over MSRP and a couple that were willing to offer some steep discounts.
Please note that there is a distinction with Denon between being an authorized dealer and an authorized internet dealer/retailer. The authorized internet dealers are the only ones that can ship outside their loca areas while still providing a factory warranty that Denon will honor. At least, this is what several internet retailers told me (I don't know how true this really is in practice).
If someone wants to know who gave the best prices, send me a PM.
I haven't bought a receiver for about 10 years since my two Pioneer Elites have performed spectacularly. I'm excited about the AVR-4520 and can hardly wait to get it and play with it :-) It ships today from Illinois and should not take too long to get to North Texas (Plano is just north of Dallas).
I'm sure you'll hear back from me once I start trying to set up the Denon and configure it