I'm glad to see someone else likes the M Sport kit. Most people don't like it, but I think it's a lot nicer than the black bumpers.
My original choice was white because it is very hot here, white is classy, and my current car was white but after seeing the gray I changed my mind. To me the gray is classy like white but with the sports looks of black (IMO).
White is nonetheless a very nice color, and if you like it go for it.
