If you can get one for $800 brand new with Denon warranty it is still the best deal for a good prepro. With the UPA-7, you will end up with 16 channels, and you only need 11. With the help of the Emo, the Denon should last practically forever, especially if you turn Eco mode on, or place a fan or two on top.
At the current price level, I bet this thing will be out of stock everywhere before or shortly after Thanksgiving.