I saw the white at the Apple store. It was quite nice, but I remembered back in the day of the old iPad 2 and the Apple white leather case. It too looked great for quite a while then started to get ratty and dirty looking.
Of course, that was leather. I wound up getting the black keyboard to match the space-gray iPad. No real issues with it except you should not have any oil or grease on your fingers or it will definitely show up on the keyboard. So it rules out eating while using the keyboard... well, it'll last longer that way.