Otterbox Defender. I've had them for my last four phone (Galaxy Nexus, Photon BB9630, BB8330). I have broken the holster on every single one of them, and each time Otterbox has replaced them. I have never broken the case itself and it seems like each one that I have owned has been designed better than the previous ones.
"Logic is rarely the engine that propels a police department forward."
-David Simon in "Homicide"