I have a 99 TJ and have made the switch to ceramic's. The metallic's have a tendency, up here in Maine at least, to corrode due to the use of the State's DOT fondness for road salt. Any type of metallic up here is heavily prone to this. The ceramic's tend to resist this stuff a lot better. That and the use of brakes up here, due to the moose, the deer and the inevitable snowmobiler, who can't seem to practice any type of safe road crossing, makes the use of ceramic's the better way to go.