I ran Nokian W106 35s for 3 years. They're about done (the studs are all ripping out) and I'm going with Marathon Winters. The reason is that the Marathons have 4 rows of studs, which should be better for getting out of icy ruts. Icy ruts are murder; the tire drops in and it won't come out, and they can dump you in a second.
Nokians are $50, the Marathons are $65.
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Work: the 8 hours that separates bike rides.