In my experience Bridgestone Blizzaks are hands-down the best snow tires in the world. I don't use them on the Trac, 4wd and A/T's are good enough here, but the wife won't roll on anything else on her car. She is NOT a gearhead and says they are amazing. I agree.
My second choice for a bit less money are Firestone Winterforce, which they make in the 245/65-17 size that my Trac uses. Both my son's Mustang and my daughter's Jeep which we bought used came with them and they are very good also.