This is the easiest way to decide. If you're more of a content reader go with a white front. If you more of a media consumer such as watching videos or playing games go with a black. My personal preference is white.
But what if you use both equally? Then you're in a pickle.
What pains me is the little black border round the screen; it sticks out with white bezels. In an ideal world, we would have a bezel that changed depending on the context. So, if reading a book with a papyrus background, the bezel would change to papyrus. If watching a video, the bezel would change to black.
How long before we see such an innovation? Maybe never. Perhaps I'm being too pessimistic, but I fear I'm not. We maybe need to resign ourselves to the fact that we will always have to choose either black or white in this imperfect world.