Big_L,
I suggest you trot down to a local stereo store and look over their stock. If you can find a truly knowledgeable sale person to help you then so much the better. But many of the "kids" that work at places like Circuit City or Best Buy don't really know much about hi-fi equipment.
I would suggest looking at the mid range receivers from Denon, Onkyo, Yamaha, Harmon/Kardon- but there are many other good ones mentioned on this post as well. (you are more likely to find these in a "normal" electronics store - as opposed to a high end esoteric stereo shop) You really need to check out the different prices, features, power, remote controls, etc. Any model from those manufacturers in the power range of 70w to 100w will do just fine for a normal home theater set-up and will power the m60s to very loud levels. (I have m60s running off a 100w Sony)
Do not be tricked into paying a lot more $ for a little more power. The audible difference (in volume - not quality) between 70w and 100w is very small (about 1.5db - 2db) Higher power WILL give you more dynamic headroom, but you will PAY for it and may never really use/need it. So choose quality sound and features (and looks?), then evaluate price and power.
Good luck!
Randyman
