I purchased a set of the Bridgestone Blizzak DM-V1 for my Blazer this year. Previously I used the Firestone Winterforce. The Firestones were good in the snow, but lacked in ice traction and were on the noisy side.
I have been very impressed with the Blizzaks. They have superior snow and ice traction. So much so that I don't feel the need to engage 4-wheel drive as often as I normally would. They ride very nice and don't feel soft and spongy.
I would have switched to these tires last year had I known they were going to perform so well!