I got 15x8 Soft 8's with 4'' backspacing. They rubbed so I got a $20 grinder from Harbor Freight and went to town on the calipers. That was about 2000 miles ago and other then some surface rust at the grind points (been too busy to put a coating on yet) it's totally problem free. The best part is, I'v got all my stock wheels and tires ready to sell.
2008 Jeep JK X: auto trans, 3.73 gears, D44 rear, D30 front
Mods: 2'' Rusty's coil lift, Superchips 93 octane tune, Cobra 75 CB radio, 33'' Duratrac's, onboard air compressor
My Build Thread! ---> http://www.jeepforum.com/forum/f96/dronacs-build-thread-1104134/