I have had a Casemate toughcase on my SGS2, 3, and have it ordered for the 4. Great case, has good grip both to hold and insofar as sliding around when set down in a car, feels good as far as shape and materials, does not collect lint, does not hang up pulling out of pocket, has passed the drop test several times, fits the phone very well, is extremely durable and looks new a year later, has a premium look that seems to be universally liked by people who scope the phone.
Not one bad word to say about them and many people I know have switched over to one at this point. It really is that good, fiddle with it and there is a good chance you will be sold. The exception being people who value thin above all else, these will not want the increased thickness.