I got mine powdercoated a year and a half ago. They hold up just fine. I drive through mud, snow, and sand a lot too. No chips or anything on the wheels...surprisingly. Although when you get new tires, the machine the tire place uses to remove the wheel from the tire will scratch the inside bevel of the rim, not a big deal. Not noticable. It's not on the visible part of the rim.
I say pow pow coat for sure!