For in-pocket carry, I got a QMadix case; it's a hard shell with a holster (which I don't use). It covers the outside along the edges, corners, and just enough forward to keep the screen off a flat surface. You'd have to buy a screen protector separately. It feels like the same material as the phone back, and makes it only slightly thicker.
I did get an Otterbox Defender - It's very robust, but like others have said, it's a dust/lint/dog hair magnet. I'm keeping it for when I expect to go out where it's more likely to get knocked around. What I don't like about the defender is that the built-in screen protector does take away a bit of the screen's responsiveness, especially when using pinch-to-zoom. It also dims the monitor a bit, which I don't like at all. I got the phone partially for it's clear, bright screen, and like to keep it that way. Others have said they don't notice a change; to me it's a big difference, especially after using it for a couple of days and then taking it off again.
