$5 agent 18 case here from 5 below. dropped dozens of times and its completely fine (im a clumsy bastard)
I got the mophie, it's a case with built in battery, almost gives a full charge after the battery dies, which is awesome, these iPhone batteries suck!!
No, I did buy the screen protector though, best buy has a huge selection of them for cheap, the extra battery is very handy, the battery will finally last all day.....Does the mophie have a screen protector? If so I might look into replacing the otterbox with it. I'm tired of having to put this phone on a charger all day.