I would take the Emotiva, it is a great price for what they offer and you have the M60s so no problems what so ever.

Another option is Outlaw Audio, they a small monoblock, the M2200, so you can buy as many as you desire but it does cost slightly more than Emotiva when you look at it as $/channel.

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