Just a warning - if you get a case with "rubber/TPU" around the edges, be aware that they bow easily. Normally it doesn't bother me, but because the S4 has the chrome band around the bezel, if there is any bowing in the case, the light reflection from the chrome makes it REALLY noticeable.
I've tried a few cases and only two brands have "stiff" enough TPU around the bezel to hide the chrome - Poetic (atmosphere case) and Spigen (neo hybrid and slim armor view). The other cases I've used (Element Atom and a couple of Body Glove cases) had the bowing problem.