Like the others, you should not have a problem driving M80's with Denon AVR's. Actually, Denon is one of the receivers the Axiom staff recommends for 80's, as well as HK. Another option, would be to use seperates.

Make sure you allow enough ventilation all around the receiver. I believe Denon states at least 4".

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