Currently I'm using Seidio Obex with holster and in my opinion it is very good case. It is really waterproof case (I've check it
), dust proof (most important for me), impact proof and has built in screen protector (is giving amazing touch).
But there is couple things which are not so good, first of all sound is a bit muffled and second thing is that some ppl will complain about it size, but for me it isn't so important.
As a conclusion, I can only say that, for me personally it was really good purchase and I'm looking to buy additional car mount to holster.