I would get the Space Grey iPhone with the Defender Series case; as I have already had 3 iPhones with the Otter Box Defender case on all 3 of them.
Best case for the best phone, while living in the real world.
Space gray and the new Otter Commuter Wallet! Go wallet!!! Love the Otterbox, both of us use them with our current iPhones. Wish the contest was for the iPhone 6-plus also. We each are going for one of each! His and hers iPhone 6 and iPhone 6 plus!