Ethies, since your primary function of this knife was self preservation, - think GRAB YANK SHANK (fixed blade) versus grab, try to access the hole or thumb stud with gloves on today when it is cold as hell and windy, pivot the blade open to lock, all while the friendly pissed off biker is trying to cave your head in.
Whatever you choose, I recommend taking the time to use either a palm sander or a piece of emory cloth on the raised points on the handle of your knife, remove any sort of sharps, burrs, irritations on the handle. You'll enjoy the knife a lot more.
Take another hard look at thoses Entreks - they are no harder to carry than a folder, they just require a little more thought at times, and a good sheath. I carry a fixed blade nearly every day while wearing either a suit, a pair of jeans and a t-shirt or whatever. It's just a planning thing and a lifestyle.
I cannot believe I overlooked this - I have also carried quite a bit a Swamp Rat Howling Rat in a slip-sheath, essentially a kydex taco for the knife, which just tucks inside the waistband. I have carried fixed blades for several years this way and have never had a problem with this. if you want a little more info on this, drop me an email