IPhone 5s color and case color?

So I'm getting the iPhone 5s and I'm ordering a case as well (the ones by apple) and I can't decide what color iPhone or case I should get. I thought black iPhone and black case or black iPhone and red case. But I've had a white iPhone for so long I'm not sure if I want a black iPhone or not. Tell me what your favorite color combos are.

iPhone: White/silver, White/gold, Black/slate
Case: Yellow, beige, blue, brown, black, and red

Added (1). white and gold is the iPhone color itself. Not the case.

White gold

White/light blue or white/gold and if you like you could just get a clear iPhone case so that you can see the colour of the phone itself.

I would say wht/gold phone w a white case

The blue one is a nice one to get I got my son a iphone from sprint he has a sky blue color he doesn't like it its for a girl you would like it.

White gold

White/gold