I 'm pretty sure the amp is different; from what I've read online it's supposed to be pretty awesome for 2 channel. I dunno, I think I'm leaning towards the M50's right now because a: they're cheaper, and b: people say they're "laid back" and that sounds good to me. Plus, it seems the M50's are more matched to my receiver, power wise. I would hate to spend a grand on speakers (the M60's) and not having them running at their full potential because of lack of power.

Thanks.
-David