The yellow would look pretty sharp but I think I'd go with red for the simple fact that red is better at hiding dirt then yellow. The yellow calipers will look awesome when you install them but the first time you step on the brake they will be covered in black dust. You pretty much will be removing all the rims once a month to clean the calipers. The brake dust won't be nearly as noticeable on red calipers. Plus, you already have a lot of red on the car in the way of lenses, the red calipers would kind of blend in better rather than another splash of yellow. The yellow wheel centers are kind of a "highlight", the yellow calipers would be another "highlight" and draw the eye away from the overall picture. I'm thinking of the difference between a pretty woman with a diamond solitare necklace and Mr. T.Good eye stile...those are 19's. Now I have room for a new set of oversize brembo's. Thinking about powder coating the calipers red or yellow. Any opinions?