I ordered an OEM blue back the minute I got my S5 and it has finally arrived after many days of delayed delivery (it got stuck in Philly for 5 days) by USPS. I always wanted a blue S5 but since Verizon only sells black and white at the moment, I figured the clean look of the white with the striking look of the blue would look pretty cool together. I'm sure it won't be for everyone but I really like it.
And yes, it has the real waterproof seal.
And yes, it has the real waterproof seal.