I'm a huge fan of the silver back. If I had my choice, I'd have a silver back with a black face. I had a space gray 5s and 6, then went for the silver 6 Plus. Got another 6 in silver then a 6S and 6S Plus both in silver. I've gotten used to the white face and as I said, I love the silver back. I guess the white/silver is my go to color. Unless of course they come out with a black/silver combo. I do like how the white face blends well with many of the iOS apps that are mainly white. I have no interest in either variation of gold.