I've been thinking a lot about this as well. On this color of car, the black just looks out of place. There isn't enough contrast. Chrome would probably look good, but I'm not really a chrome person. Gunmetal is again too close to the color of the car. Bronze is just about the only option for me, but if it's a bright bronze it would look downright silly.
I'm interested in hearing others' opinions as well.
i find the titanium grey color kinda hard to match with a wheel color. heres my car with some really saturated gold rims that i had on for about a month. wish it was a lighter gold then it woulda been perfect.
heres a photochop of white
heres another chop of some darker gunmetal color rims