My room is 8,100 cu ft and I have monoblocks driving my 80's, however, my Denon 2805 by itself has plenty of power. Your only going to use a few watts most of the time, with brief peaks of maybe 100 watts.

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