I recently picked up a set of used Dymag cast magnesium wheels for my '04 and finally got them on the bike. Holy smokes, what a nice difference! Easier to turn, but really makes a difference when going back and forth, like through esses. I like the silver better than the OEM black, too. If you can get your paws on any sort of lighter wheels, go for it. Carbon wheels must really be crazy. Thanks Mark!!