Had a white and a Carbon Steel Grey MK7 GTD's and both looked great (if I'm honest I think I preferred the Carbon Steel Grey). Only trouble with both is that they showed the dirt and marks very easily.
I now have an Indium Grey GTI, and I don't know what it is about that colour, but it seems to look like it stays cleaner (at least from distance) much more than the other two, and as it's a much lighter grey, doesn't show paint defects like swirling and hologramming any where near as much as the Carbon Steel Grey.