Those are all fine units. The main thing is to find the receiver that has the features your looking for, and not worry to much about sound differences. What is the room size, type of speakers, listening habits, etc...?

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