The M60s are an easy load on a receiver, and one can be chosen based upon the features you like.
Reputable brands include Denon, Onkyo, Yamaha, Pioneer, Sherwood-Newcastle, Outlaw, Marantz and Harman Kardon. Sony doesn't seem to be as popular with HT enthusiasts, though they're popular at the box stores.
Denons are popular here, based to some degree that they have no problems driving 4 Ohm speakers. Onkyo seems to be the better value of late in terms of feature set. Yamaha always has its fans, and a new model was just top-rated at Audioholics. Sherwood-Newcastle is a high quality option, and sold right here through Axiom (anyone know if the "5 piece discount" applies to S-N?).
