How big is your room and what are your listening styles/habits? The m60's are awesom speakers and I owned them for years. Depending on your budget, you might consider the 80's as they aren't that much more, and do provide a little better bass and a bit more detail.
Don't get me wrong the 60's are awesome, and if I never would have gotten a case of upgradeitis, I would still be totally satisfied as I would not know any better.
However, for my larger room, the 80's do a better job to fill the space...
What are you going to be driving the system with again? Are you ordering from the factory outlet to save 10%?