For tactical, aka self defense/combat) I think the KD would be the best option. It seems lighter, and better suited as a combatants TOOL, and yes weapon in a pinch. Digging holes through walls uses like that could and have been done in certain situations. Personally I would go with the kill devil unless I was getting it ONLY for defense. Then the Rattle Hawk MIGHT get the nod but I would have to think on it.