Survival knife? Not sure what you mean by that, but it sounds like something a fixed blade might be better suited for. Those are three very different knives, so it depends on what you want. The Al Mar is VERY slim and light, not the strongest, but it should be strong enough for reasonable tasks. It will also be the easiest to carry. The ZT is tough and big. The Bedlam has a blade shape more suited to stabbing.