Don't get hung up on he 4ohm versus 8ohm thing, if you get 80's that Denon won't even break a sweat. The 60's would do fine in that room space, as my room is bigger and I used to own 60's for a few years, now enjoying the 80's. \:\)

I believe if you check the top thread on the forum there is a discussion about the tradeup program. Otherwise, you could just call.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85