I think it depends on how far away you plan on sitting. I have M22s and VP100 in a similar size room and sit about 10' away and everything sounds great. However if you plan on filling the entire room and not just the sitting space then the M60s would be in order.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70