I've been looking for a rugged-looking, military-style case. I ran across this case, the Magpul iPhone Executive Field Case, which seems very decently priced: http://www.metaldogtactical.com/maipexficaip.html Has anyone had any experience with this particular case? Quality? Durability? Protection? I am looking for a case that can keep out sand and grit (especially after a day of ATVing) in a similar style. Does anyone know of a case?