I would say 511 and Kill Devil Hawk. Obviously the 511 will be able to process food, baton, skin ect. The Kill Devil Hawk will be able to pry, easily chop, process fire wood ect. It pretty straight edge, which would prove easier to sharpen, if say we are pondering a survival situation as well. I would probably only choose the Rucki, only on the assumption that I am defending myself alot. Otherwise, I feel sharpening it would be quite tough out in the field.