I've got 285/60/18 Nitto Terra Grapplers on mine. They have excellant traction in snow and heavy rain (you'll run out of visibility before you lose grip). On dry pavement, they grip well and aren't very noisy. Plus, when you do corner "enthusiastically" enough, they make the same sound as the tires on the Batmobile in "The Dark Knight"! (I realize that last item may only be interesting to me.... )
Randy