I'd say gunmetal, but i dont have either on mine, but i have looked into it. Ive heard a few people who got black got tired of them, but i havent heard that for gunmetal. But dont listen to me, its up to you. Good luck
Gunmetal owns all. I have the stock gunmetal rims (here they come painted from the factory) and they look awesome on my ABP and all colours for that matter. I think black rims would look to plain/steel wheelish.