Vaultskin finally put out their iPhone 6 case. I highly recommend them. While it's pricey, I had one for my iPhone 5 and loved it. It was the best case I owned on the iPhone 5.
(They don't provide much protection for the front, however. Just an FYI, if you're someone that likes to drop their phone and didn't pay the $99 for AppleCare, then it might not be the case for you.)
Hopefully it'll be that good for the 6 as well. I'll let you know as I ordered one today. (No iPhone 6+ at this time though.)