I would either get 15's or 16's. You said that you don't offroad that much, but the smaller the rim, more tire between your rim and the ground if you air down. Also look for a rim with as little back spacing as you can afford. I wouldn't settle for anything less than 3.5 inches. It also give your jeep a wider more aggressive stance.
Also Salt destroys chrome as said. I would get a set of alloys if you plan on running them in the winter. I go back to my 30 inchers in the winter. Looks funny on 5 inches of lift.
Alpha 2/122 FA