I was eyeballing that price on Amazon, then saw that for 200 more at Accessories 4 Less I could get a factory refurbished 4520. I decided to jump on it, but was having issues getting it into a shopping cart on line. So I phoned them the next day, and upgraded to a brand new A stock for surprisingly little over the refurbished. I've been chugging along with an Onkyo 876 for 6 years now, and it's been rock solid, but these models had a 8-10 second delay for HDMI handshake, noisy relays when changing sources, heat issues, plus it seemed to be fussy with a new Oppo 103.
Anyway, it's a good time to buy Denon, as long as you're okay with no Atmos.