I'm using a speck on my iphone5. I ordered a slim case from Casemachine... Over priced piece of garbage, threw it away in a week. The packaging probably cost as much as the case did.
I have the Otterbox defender on my iphone 5, it does alright only part I don't like is how raised the case edges are next to the screen and how it collects dust in spots. Case I really want is the incipio atlas case mainly for it being dustproof but being waterproof is good too just waiting to see more reviews on it.
I use a life proof also but I had one come apart on me already and got a new one and now it's starting to also. I was thinking of going with the ballistics.