Great scene, but crop is a little tight for my taste. I think increased saturation in the Red and Green channels could make this really "pop." (You may even want to check settings on the menu in your digital camera to see that the original color settings are as saturated as you would like them to be.)
However, overall great photo! Keep on truckin' (or jeepin'),...No Matter! :)
Now ya see, for me, a 'top' is optional on a jeep, and just because it is open air doesn't necessarily mean topless to me. I would have liked a bit brighter colours here. Nice angle of the jeep.
i'm thinking there is more noise in this image than you would have liked. you should check out Neat Image for help in correcting what happened during your post processing