I have head from guys that plow that the duratrak is hands down the best snow tire, they dont even use 4wd anymore.
I can tell u i love my terra grapplers, they are quiet as a street tire, do geat in rain, good in snow, geat dry traction, and in mudd with a little rpm they clean right out and EAT. For an all terrian tire, it out performs the good ol BFG. And they are very reasonably priced and last about 50k with road driving. I hear most guys getting like 40k out of durratraks with highway driving.
If i were in a heavy snow area or did a lot of off roading i would go durratraks. If i do mostly highway and light off road, (drive thru fields and grass to get fire wood, hunting, ect....) which i do.... terra graplers!