Probably switch it up and go with black this time.
It is very hard to find a case for a white iPhone that will not get you punched in the face as a male. And then when you do find one, it discolors quickly.....first world problems.
Going black this time and going with 32GB this time. 2 things I regretted with my I4S are that I got it white and 16GB. White gets dirty to easy even with case. Screen protector looks yellowish after awhile on white iPhone. I wonder if white will be slightly thicker than black with this new model