The Body Glove case for the Vibrant is great. It looks good and offers good protection. The silver ring around the front gives the phone a good look. This is the best one I have found without all the bulk
I have the Otter Box (silicone wrapping with a hard plastic back that fits over it on the back). I like that but I also wanted something to cover the screen so I bought a Miztech case. The Vibrant slides into the case and it has a flap that holds it in with some hidden magnets. That works out good because when it's in a backpack or some other place where it might get banged around if I'm not careful. I bought the Miztech case from Microcenter for 10 bucks, but I have heard you can find them at Odd Lots for less.