White has been the new Silver for some time now. It's amazing to us old 'uns in the car industry as white used to be a no-no not long ago in terms of resale...
However, most manufacturers have cottoned on to the fact white cars actually look good and now charge for it.
Black Metallic is a safe choice.
Personally, I'd stick with what you like. My current set of wheels is Metallic Grey. I too was nervous to see it in the flesh. It looks great. I've done Silver and Black to death and will definately order another.......
Enjoy....and stop worrying.