I would try it first to see if you have issues, they you can look into getting additional power. I would leave the switch in the 8ohm position so you don't limit current to the speakers. The 80's are more efficient, so it should work. Worse thing that could happen is that you may have to get some amps later..

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