Hello there and welcome psj2539!
I chose this one but it's just my suggestion:
Platinum Series - Case with Holster for Samsung Galaxy S III Mobile Phones - Black - SGC22SB
It doesn't exactly cover the face of the phone but it covers everything else.
And I may move this to the SG3 forum if you wouldn't mind? You might get more feedback from there
Edit: dread's got a better link for ya