Thought I'd interject about Ashley Gilbertson's comment on the body armor. I use the M8 with it pretty much all the time and have NEVER had that problem. What I find interesting is that he didn't have anything attached to his vest, as that would be no different than using it on bare chest. If in doubt it is always best to test what you will be using with what you will be wearing.
For any of you who plan on shooting a combat zone, I'll give a little advice. Throw a couple of pouches(for extra lens, etc.) on the vest so that the top of them just sits below the breast line. When you adjust the strap where the camera sits on top of the pouches it provides good access and protection. Leaving the camera low in and around a combat area results in broken stuff. I learned the hard way.
Not too sure why I added that but it's something that has worked for me.
Cheers!