On my 2000, with Jason's old wheels (I bought them off him), I didn't get rubbing with the BigOs, but do with my Goodyear MTRs.
I rub on the rear of the fender liner, up a few inches from the sheetmetal. Sounds nasty, and I'm starting to rub a hole in the liner, but only when I turn the front wheels and stuff a tire.
I'm also carrying a few hundred extra pounds of weight up front, so that has an effect. With stiffer springs it wouldn't be as much of a problem.
Again, as it's the edge of the tire, when turning, either taller or wider will make it worse, and shorter or narrower will make it better.
So depending on your wheeling type, go the direction that works best for you, or live with it, it's not bad at all. Just sounds nasty on occaison when it happens.