If you're only planning on 2 channels then you could consider a Harmon Kardon HK 3480. Lot's of power to let those M60's loose.

HK

2xM80 VP180 2xQS8 2xM3 HSU STF3 LG 60PS11 Denon 3808 ATI 1506 LCR 2xATI 1502 Oppo BDP-83