Me again just re read your first post thats a big room, I would def, get the EP500
also, I would without a double get a Anthem MRX720 and still have enough to get a 4 channel amp at the same cost of the Denon.

Actually I would hold onto the Sub money and keep an eye on the Deals and you can nab a EP500 for the same price if not maybe a couple hundred more. I got mine for $965

Anthem MRX520
M5HPv4
VP160HPv4
QS10v4