Just a heads up on the Beats case, personally I'm getting on with it better than the Apple cases. It's quite a bit less grippy but feels much harder wearing and you don't get lint, fingerprints on it as others have stated. The feeling is quite smilar to the matt finish on the rear of the phones.
Having had the softer Apple silicone cases which begin to fall apart after a few months it does feel this will stand up much better. I also like how the bottom is open as it feels better swiping up on the screen to go home etc.
To be honest it's a shame they don't make Apple versions of these, I miss seeing the Apple logo on the back!