Most likely the silver... although the black looks nice too. I'd just like something a bit different this time, since most of my phone's are typically black. And the blue seems a little cartoony for me.
Silver is easily the best looking in my opinion. Still don't understand why they needed such a big glass window on the back (a window the size of the 6p's but flat would have looked so much better). But over all I think the silver version looks pretty good.
While I traditionally favor black phones I've developed an eye for silver ones. Done right, they look more jewelry like than the more utilitarian black. Wish they'd make a black and blue "bruised" pixel haha.