I bought a really cool Porsche replacement back for my new iPhone 4, and as a result I obviously don't want to cover it up. However, I do want to get some protection for my new baby, so I'm thinking a bumper may be the way to go. I was thinking of getting the official Apple bumper, but have heard reports from users that it is prone to scratching the metal rim of the iPhone, due to particles getting caught under the bumper. Does anyone here have experience with these bumpers, and can comment either way on this?
Alternatively, does anyone have any recommendations for other good bumpers (or cases which don't obstruct the design on the back)? I purchased an iLuv silicone bumper from Harvey Norman on the weekend which seemed to fit the bill nicely, but once I had it installed I found that it was extremely slippery, so decided to return it.