Black for sure. The screen looks much better against a dark bezel especially when watching movies, etc.
Also, I hate seeing the little holes for the proximity sensors and the notification LED. Just looks cheesy as hell to me in white with all those dots along the top of the screen.
.NET Architect / Developer, Phone Hacker, PhotoShop guy - I seem to be getting the best results with the last one. Go figure.
HTC 8525 -> Samsung Instinct -> HTC Touch Pro -> HTC EVO 4G -> HTC Evo LTE -> Samsung Galaxy Note 3
Galaxy Note III: The Revenge