i rode the clement blue cyclcross (tubulars) tires all last winter in indiana and the winter before in ohio. they are the BEST winter tires i have ever used. tubulars let you get way low with the pressure without the risk of pinch flats for some additional traction when the going gets tough and you have to ride through a foot of snow early in the am before the streets get plowed. on those days i ride 50 psi, though you can go as little as around 20/25psi if you wanted to. it'd be slow going though. anyway, they also have a relatively narrow width so they cut through slush easily. the only downside is if it's just smooth pavement you're riding on the "dot" tread gets worn to **** in about 3 days.

so for snow and a little ice, definitely those. but for mild slush, etc, i never have a problem. i love fixed in the wintertime, keeps those legs warm!