I'm running the Xi3's, and so far have been very happy with them, although I never had problems with the stock tires the first year they were on the car. The Xi3's definitely have much better traction. Have the Blizzaks WS80s on my wife's car and I don't care for the noise (not loud, but you could hear them). I cross the Continental Divide twice every day, so I do drive a lot on snow covered roads with lots of hills.