I looked for a knife for SHTF and I bought these: Gerber LMF II ASEK
I like this one because it has a nice sheath, a sharpener built-in, the little seatbelt-cutter gadget slips in with the sheath, the steel is tough and not brittle. It is pretty idiot-proof. Yes I should know how to sharpen a knife decently but I haven't taken the time to practice and learn how, so I like the built-in knife sharpener (you just draw the blade through and it does an o.k. job.) I have used it to dig roots with and cut small branches. It feels good in the hand, it is thick and sturdy. In fact I really love this knife.