I'm super late to this, but I've used IS, BSE and Bodyguardz, and for me, Bodyguardz wins. The least amount of Orange peel and yellowness. It comes with 2 per order, and lifetime replacements.
I also have 5+ different cases. It became an obsession for a while. Off the top of my head I've used the leather backed griffin, the incase slider, the wave, the otterbox, the switcheasy rebel and neo, the flick, and an iclear like case. Know what I'm using now? NOTHING.
Theyre all sitting in an f-ing tupperware with all the screen protectors they come with just collecting dust.
Do yourself a favor and buy some damn insurance from squaretrade and dont worry about scratching your phone. Seriously. It's a phone.
Check out itsmemorphious on youtube. He does case reviews.