Based on what I just saw there, I would ask if you've considered the D3x. The D3s would be a second choice, and the D800 a third choice. If I was carrying my camera in hostile environments, I would want a full pro body. Period. Some of the subjects here deserve more than 12MP too.
The D4 comes closer to ideal, but the higher MP count of the D3x would be pretty high on my list.