I was at GXV about 2.5 wk ago and checked out the green one. I understand the ones with the Cat engines are military and protected from EMP. I also understand GXV does or can rework the rear axle to get the top speed from the stock 60 mph to about 75 mph. I personally would take the silver unimog u500 they have for sale, as I think it will do more and ride better, but I could be biased as I love my u500.Those Bae's are awesome, though, and at least while stateside, getting one of them worked on is easier than finding someone to work on a u500.