I'm trying to decide between a Harsey tactical with a S30V blade and an ExtremeRatio Fulcrum IID with the cobalt N690 steel. Does anyone on the list have an opinion? I want to buy a really good blade and keep it for years, and so any and all comments are welcome. Which blade holds a better edge, which one is tougher, what has anyone heard about how much abuse these knives will hold up under? Thanks a lot!