I'm with Britton, I developed a liking for simple silicone on my BB Storm. It takes most of the everyday wear and tear the phone gets from typical handling. Cheap and easy to clean or replace when it gets dirty and doesn't add a lot of bulk. Couple it with a nice adhesive screen protector and there should be no problems. It may not offer drop or shock protection like an Otter, but I'm pretty good at avoiding or being careful in those cases.
I found one from Diztronic on Amazon for like $8. Fits like a glove, cutouts are perfect and good grip and feel.
My dad has an OtterBox for his GS3...hate it. Insanely bulky, blocks the edges of the screen and the screen protector is worthless, it's not adhesive so it actually traps dirt and hair against the screen because that crap does get in there.