In regards to # 2 , it will depend on what you are coming from and going to. My stock tires were the Wranger RT/S's , 235/15's, they SUCKED in snow. Now I have Perelli Scorpion A/T's in 31"X10.5/15's and they are just great in the snow, like Gjarret said, if you are going to a more agressive...