I'm upgrading to a smartphone this weekend but haven't quite decided on what to get. I have narrowed it down to one of 3 choices. I am with AT&T so... iPhone 3G S Samsung Epix Samsung Jack The two Samsungs because they are Windows based, which I would prefer, however the iPhone has it's obvious advantages. I'm curious if people here have any of these and can give a few reasons for or against any of them. Thanks.