Emersons as said above, are cool, but not the best IMO. I dont like the locks when comparing them to triad or Axis. but the emerson commander would be the knife of my choice from their line. for heavy duty use,
I would agree with the Adamas as being a great choice. the blade is THICK and very hard. almost never needs resharpening. I have had mine for a few years. the lock, as shown in the video posted previously will not fail. the steel liners will fail before the lock does.
I also own a coldsteel recon 1. It is a hard use knife as well, but... I like my Adamas far more. and it is a superior knife, obviously, when doing a side by side comparison. much more steel in the blade, thicker, and a thicker grind, the coldsteel gets very thin very fast, toward the edge. the adamas has zero blade play, my coldsteel has a lot of side to side play, I attribute this to the lack of steel liners, it is just g10. the coldsteel locking mechanism, while strong, is unwieldy in my opinion, and really makes the knife less user friendly. the axis lock is, I would wager stronger, and much easier to use. the coating on the recon is horrible as well. mine all chipped up, so i just took it off. The benchmade coating wears through, but doesn't chip, and doesn't look like hell when worn. Adamas also comes with a molle sheath if you would need to use that.
that being said, I have a few coldsteel, a few benchmade, and a few others. the fit and finish of benchmade is great, and coldsteel doesn't compare.
good luck with your search! an adamas would not disappoint. others have suggested zero tolerance, I dont own one so i cannot comment on longevity, but they are rock solid with beefy pivot points and perfect blade shapes. IMO