First of all, they are no longer called 'tactical folders.' They're sport utility knives (SUK's). Instead of listing certain models, I list the features I like:
Strong, obviously, but no excess weight. I like to see no more that 4 oz. That rule cuts out many models for me, but it can be done.
Positive flipper guard, for safety (not for opening the knife). The CRKT/Carson M16 is a good example of a guard that I like. Ditto the flippers used by Darrel Ralph.
I like to have a flat black colored blade, because black doesn't draw the eye. It probably will never make a difference, but it doesn't hurt. DLC is the best, followed by titanium nitride. Something with enough hardness to resist scratching., which DLC definitely has.
Strong tip, because if any knife breaks it is probably going to be at the tip.
Tip up carry, and detented well enough to be carried that way safely. And also to take advantage of tip-up carry it is nice to have very smooth opening. To me, pivot bearings like IKBS are the way to go. More makers are starting to use them, but all should.
I would include some kind of quick opening system like the Emerson Wave or Kershaw assisteds, but the wave is for the most part limited to Emersons (and to front pocket carry, which I don't do). I don't like assisteds because I've had 'em open in my pocket, and the spring is a weak link that could break at the wrong time.
Blade steel is really pretty low on the list, but if you're getting all the other stuff, you may as well get the blade steel you want. I still think S30V is the best all-around. ZDP is amazing stuff, and one of these days I'm going to get off my ass and order one of Yuna's laminated zdp-ats34 pieces which should be strong & still cut like a laser. His pieces are close to perfect in my book, except no IKBS, and no black blades. There is a case to be made for CPM 3V. I once talked to Ryan Johnson who makes tomahawks out of 4140, and when I asked him about S7 he remarked that he thought more (so-called) tactical knives should use S7 (impact resistant steel).
As for specific models, if you look at my criteria, there are precious few that meet all counts. There are a few makers like R.J. Martin, Darrel Ralph, and Brad Duncan that could meet most or all of my specs (anyone know of any others?) Also maybe Todd Begg, who is now using IKBS.
As for production models, it's hard to argue with the Emersons, even though they are slightly heavy. No flipper guard, but the deep index finger groove in the handle serves the purpose. The CRKT M16 is also good. It looks like the double guard versions would even function as a waved SUK. Also overly heavy, tho. Also the Benchmades are up there, except that they pretty much eschew flipper guards.
Sorry for overly long post...went a little wild.
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