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IMO, gold is probably the ugliest color for any color car... ever! I'd say black, white, or any shade of grayish (silver, light gray, dark ray, etc) rim is the best. Personally, I think black is the best.
Do you know what brand of wheels you like best? It helps to have a starting place, once you know that go to the Picture Share forum and search it for the wheels you like. You'll find a load of pictures for just about any wheel.
In the wheels forum there are some specialized 18" and 19" wheels threads that have a lot of pics posted in them too. Track them down and give them a look.