Thanks everyone... if I had to do it all over again, it looks like I would be buying the Nokian W240s... though I'm still on the fence about switching now. Peter White's site seems to suggest that there isn't a large difference between the MW and the W240, but then again, I have seen at least 2 or 3 people state that the MWs aren't great in snow.

Mainly I'm just bummed about riding less lately - this is my 3rd winter commuting season, and I can't remember having such a long stretch where I didn't feel confident about doing the entire commute. I almost always do at least the last quarter, though. Certainly better than nothing.

How long should I expect my MWs to last before needing replacement? I estimate that after this season, they'll have around 1500 miles. They still look great though, with the exception of aforementioned missing stud on one. Probably should have put that one on the rear instead, now that I think about it.