Hey dj, I would consider how small the stock brakes will look with 19's. I have considered 19's too and just can't imagine how tiny our brakes will look. If you're thinking of adding "S" or 996 brakes down the road, I would go for the 19's. If not, I would stay with the 18's. Also remember, with bigger rims comes extra weight = slower car
Things to consider, but any way you go, I hope they're Black, and we see em soon!