If you want ANY type of winter performance, then the only way to go is the Continentals.
My Michellins just spun around, on the first day we had snow! Absolutely zero grip.
If you look under the Parts/Accessories For Sale forum, I have a set of Continentals that have less than 300 miles on them. If you end up with Michellins, and want the Conti's, I would be willing to swap them with you.
Just a thought to keep in mind!
:-)