Quoted:
Thats quite a hunk of steel. I'm not familliar with O1 steel (rust, edge retention etc).
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Superb edge retention; very good toughness and crappy rust resistance. However, I am of the opinion that all knives are rust resistant when cared for properly. O1 is a carbon tool steel. I own very few stainless knives because I prefer the carbon steels. I do have a few from D2, which, as the saying goes, "takes a terrible edge and holds it forever!" D2 is a semi-stainless
It is mostly a matter of priorities. What is the most important to you? There is no perfect steel for all situations. You made a good post and gave us a lot of information, but not necessarily in priority order. That is not a criticism, just a comment that you will need to decide which feature is most important: rust resistance, toughness or edge retention. It is always a trade-off.
The ultimate in toughness with good edge retention is L6. After that, it goes in rough order: CPM3V, 5160, O1, A2 . . . Note that none of those listed are stainless. . .S30V is very close to the latter steels and is stainless. If stainless is important along with some decent toughness, then a custom in S30V is the ticket. CPM154 is also very good for smaller knives.
CWO, I was mostly kidding with my unabashed marketing attempt. . .