i'd say go with Performance Snow tires. i have Michelin Pilot Alpin on my car (not M3, i know), they're V-rated (i think, "high-speed" anyway) so you can still hammer it safely on the highway on the way there (better traction on dry pavement than my OEM no-season tires) and at the same time they also got me through the Rockies last December fairly safe... you might sacrifice a little bit when it comes to best traction possible (vs. low -speed dedicated snow tires) in the snow, but at least you're not limited by these tires on dry pavement, which would be 95% of your trip...
just my $ 0.02, but either way i wouldnt take a chance on high-perf summer tires on the snow, regardless of what car you dirve!
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