If you are going to start wheeling it, go with 33" tires. You will want them eventually anyway. Seven to eight inch rims with 4" backspacing, and 2" budget boost to fit the tires.
Some type of LOCKING differential for the rear. This will be the best 4 wheeling modification you will ever make.
2003 Rubicon, 5 speed, 33" MTR's, Warn XD9000i, OME 2.5", 1.25" BL, 1" MML. Rokman gas tank, xfer skid, ctl arms, coil correction, and rear bumper. Currie steering.