Many users of Kershaw's/ZT's S30V have said that their heat treatment of ALL of their steels are the best heat treated knives for a non-custom knife. IIRC, Kershaw runs the S30V at 58-59, but I could be off by a point.
Out of the S30V knives from Kershaw that I have, I can vouch that they do hold an edge for a long time, as well have "tough" properties (I've pried, batoned, etc.)
Some others will chime in with much more experience than what I have.
By the way, nice score on the avalanche. Those are one of the best deals around.