The toughest knife I own is a Swamp Rat Camp Tramp. Great knife, but unfortunately I don't use it as much as I thought I would (when my children were born, we stopped camping and hiking as much).
I would also say that although I really like the knife AND the people at Swamp Rat, they are not particularly good at keeping a timeline. I waited much longer than I was told I would for the knife and they have had timeline issues with other pruducts as well.
Their blades are great though and if you are patient, then I would pop for one.
This post is simply meant to be informative, not inflamatory.