I've already purchased one of those plastic see through cases for my 3G iPhone and I'm happy with it. However I also wanted a case to use when I go to the gym that I could clip on to my pants. I really don't like to take my phone out of the pastic case as I think it can wear on the plastic hooks. Ideally I'm looking for a case with a clip that would fit my phone while it's incased in the plastic case. Anybody know of such a case?