Purchased two Griffin Survivor's and sold them do to the fact they have 3 very sharp ridges that you have to jam the phone by to snap it into the case.
Was not going to take a chance with my black iPhone 5 as I'm almost sure these sharp ridges would scratch the crap out of my phone.
I'll keep waiting and see what the Lifeproof case looks like.
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Casemate xtreme is another good one. Good protection with built in screen protector. Wouldn't rate it as high as a LifeProof or Defender but it works well.