I'm kinda lucky in that my chassis forces me to use 205 or less tires, so pretty much anything rated for snow works wonders. Last year I ran Kelly/Pacemark Snowtrakkers (mostly because I waited too long to get tires, and when I tried driving in our first snow with my Hankook RS-2s, I realized I needed whatever I could get). They worked REALLY well in the snow, never once did I get stuck. I pulled someone from a snowbank in VT with them, too. I also did an RX on them, and they worked fairly well for that. And a road rally in the backroads of NH, in winter, after a snow storm.

Downside? WORST WET PAVEMENT TRACTION EVER. I never feared they'd break loose or slide (though they pushed like pigs) or anything, but if you emergency hit your brakes on wet asphalt, the ABS was on
immediately. And I was on stock RS brakes at the time.
I have a friend who loves Nokian Hakkapeliittas, but I've had no experience.