Which color would look best with the space grey variant? How is the protection with it?
I'm loving mine. I got the red for a space grey. It's pretty thin and I doubt it will provide much protection other than scratch protection, and possibly dent protection in case of a short drop. The lip of the case sits above the screen, so I think it could be laid face down without worrying about the screen scratching. I put a glass screen protector on it anyway, and the sides of the case are still higher than that.
As for colors, I think the black, red and pale pink look the nicest with the space grey. The pink is more of a very pale pink champagne color, so not necessarily feminine.