I personally bought the white but also bought the green, orange, blue and black battery covers on ebay for like $6 a piece. that way I can switch it up every once in a while.
If you are going to get a cover or case, then color is no concern. Otherwise, I'd get black to avoid smudge and grime grit from showing on white plastic down the road.
I own a Lumia 950 in white and whilst I can understand why you may find white alluring, I would advise against it only because the plastic becomes very dirty after a while. In hindsight, I would go for black and would recommend the same.