Update:
The RAC Monolites RG63s are on
18 x 9 +38, Continental ExtremeContact DW 255/40
18 x 10 +27, Conti EC-DW 285/35
Stock suspension as of now
Not a ton of miles on them so far. Just today, during a spirited drive, I encountered a good dip in the road at a small bridge over a creek. Back country road, your typical down hill to a small creek bridge then right back up hill again. I was doing a descent clip through there and under that kind of hard compression I got rubbing up front - inner fender right where it attaches to the bumper cover.
My concern is that I would like to go to some Dinan springs and I'm worried that it will rub more often than just under really hard compression as in the scenario above.