What do you guys think is the best bumper on the market? Just bought an iPhone 4 and I had it custom made with a Red Front and White Back. I don't want a case to cover it up so I'm going with a bumper. I've looked around and I have a huge interest in the Case Mate Jett. However, the black is sold out so I'm looking around for other bumpers. Feel free to discuss what you think is the best bumper out right now? I'm mostly looking for one that has a cover for the volume/vibrate/sleep wake button.