Personally I bought silver and will give no more thought to iPhone color, but there is no getting around my dislike of the bright white ceramic back. I really wish we had a choice for a gray ceramic back.
They matched the ceramic color to the blue and orange aluminum - so I'd love to know why they stopped there. It makes the silver back a bit "busy".
What gets me is that the glass trackpad on a silver macbook is a perfect match for the aluminum surrounding it. They couldn't give the 17 Pro a similar treatment?
Also, isn't it glass?