I know there is a lot of info on the forums about cases. Getting my 24 year old son his first smart phone, the iPhone 4S. He is REAL rough on phones. Drops them, scratches them, etc. Even with a bumper or Otter case, I'm worried about scratching the screen with keys, etc in pocket. I don't like the plastic screen protectors. I'm thinking of getting him the standard bumper for when he is using the phone and trying to find a holster of sorts that will hold the phone with bumper when in his pocket. Any thoughts on a holster that will accommodate a bumper or any other thoughts on max protection? Thanks.