I use the Otter Box defender case/clip combo. The clip can be used either way, with the screen facing in (very protected) or with it facing out(to use like a dock). On top of that the clip piece locks into full open position, allowing you to use it as a stand. Handy if you want to sit on the desk and have it maintain orientation, and also when using an alarm clock.
The case itself is also pretty resilient. I work for GeekSquad, and after hours one night I literally threw my phone across the 20,000sqft store to see how the case would hold up. No damages at all. Brilliant.
Another cool feature is the non slip silicone outer layer. When I am rolling around in my Jeep, I can plug the phone into my audio aux in, and throw it onto a seat or the center console, and it never slips around.
I know I probably sound like a crazed fanboy, but I am very impressed with the case/clip and have had it for about a month.
I would post a link but apparently I cannot until I make eight posts. Google Otterbox, their site is easy enough to navigate.