You can always bring along a ball peen hammer just in case you 'had' to take it off road, 'discovered' that it rubbed, and had to convince the fender to give your tires a little more breathing space! /forums/images/graemlins/laugh.gif
Im running 265x75xR16 Fisk Phantom All Terrains that I got for $300 installed @ America's Tire, w/ a warranty. They were one day old take offs, siped, but I badly needed something to replace my balding 235x85xR16's and I couldnt beat that price.
Long story short, I decided later that night to take the running boards off to prevent rubbing.
I wonder if you have any pics of how close the front tires are to the fender when you turn em? I was sure I wouldnt be able to fit 33x12.5, based on how close my 265x75's already are, but I might reconsider. Not that I plan on buying new tires anytime soon, but I remember seeing some 33x12.5's in the paper recently and the price on em was right.