i preordered the 4 and would like to have a case ready ASAP. I currently have a Note 2 with an otterbox. I'm often out using my phone and need to swap batteries when away from chargers (mostly goecaching or benchmarking). The otterbox isn't that much of a PITA to take off and put back one though mine is pretty beat up right now. Anyone have suggestions for a rugged (often drop it in the woods, etc) case that isn't going to take 15 minutes and a manual to remove and put back on?