I am looking for a bumper case with a bigger headphone jack.  I have a pair of AKG K-55 headphones and would like a case that works with them.  The jack is 9mm in diameter, so it won't fit in the Apple bumpers 6mm hole.  My car dock also has a bit larger of a dock connector, so that is a concern too.  I really like the style and feel of the Apple bumper, but with those tiny holes it is just impractical.