Nokian, either W106 or W240. I started with W106s and they were great, the only downside is that if you got in a rut they didn't have a row of wide-spaced studs to help you climb out. This may not be a problem for you. I'm now running W240s.
I tried Marathon Winters and they were OK but the tread block on them goes only from side to side, so when I'm riding on highly crowned or banked roads (I ride some gravel roads which are steeply crowned) and over a couple of inches of unplowed wet snow, everh time I put power to the pedals the rear tire would slip sideways a foot and I'd have to put a foot down and stop. I sold them after one season.
The Nokians are a bit expensive, but the grip that they give is priceless. Twice now I have started in to work in my car but it was too icy, so I went back and rode instead. Once there were a bunch of cars and none of them could make it up one hill, they were all just sitting there I guess waiting for the sun to melt the ice. I rode on by.
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Work: the 8 hours that separates bike rides.