Does any one particular stainless steel stand out for greater toughness? I know this will depend on the heat treat and geometry, but since when choosing a factory or even a custom knife, we know very little about the heat treat, and can't control the geometry, but we usually know what it is made from, I thought this might be a good place to start. I also realize that stainless will not compete with carbon steels but does any stainless come close? Thanks.