kfc, I've trial fitted an AEV Pintler to the new 2011 GC but there are a few problems.
THe brake calipers is basically going to strike the caliper, nor could you use stick on weights to balance the wheels as they'll smash on the capliers. Also the actual wheel nuts are so large they dont even fit into the AEV wheel nut recesses!!
It seems the 18" ones will be the go for this Jeep. There are some nice BFG 18" AT's available but they're around $500 a corner. I reckon the stock 18"s powdercoated black with wheel spacers and 285/70/18"s will be the go