You could just go caseless...I'm going caseless, only a vinyl skin on the back, and some Best skins ever (same as your 4fixx from invisi shield) and what not on the sides of the phone. I've dropped the thing 3 times and it's fine, I've thrown it off from one side of my room, i've dropped it at the library (actually library dropped it for me >.>) and I've also thrown it across the room (aiming at the couch and missing) and wacked it against the wall.
Phones still as good as new, no dents nothing. sooo I don't know, seems to be holding up well for me 😀