It sounds like you're built pretty much the way I am. Sorry to hear it.
My experience is that if you suspect a knife is just a little too big to be a good necker you are almost certainly right. I found even the Camillus Arclite just a bit too long for my comfort.
Of the knives you listed I can recommend the Spyderco SPOT without a moment's hesitation. It looks strange, but the ergonomics are outstanding, and I'm not just talking about the amazing grip. That peculiar Reverse-S blade is tremendously versatile for utility and it can really slash. And the outward-bent tip just happens to line up perfectly with your wrist for punch-thrusts. The whole thing is light, flat, and short, including the well-designed sheath. If they made the SPOT in Talonite I would probably have to marry it.
My second choice would be the Microtech Medallion. The sheath is not great, but it is serviceable, and you can always have a better one made if you want. The knife iteself is a wonderful design that gives you a solid three-finger grip behind a finger-guard that will not let your hand slip onto the blade. The classic recurve shape is probably my favorite overall and this is a beautiful example of it. You get a sharp point, plenty of belly, and a recurve that can double as a hawkbill or just provide more virtual length for cutting.
The Emerson La Griffe shares a lot of the good features of the SPOT, but I am not as fond of the hawkbill blade and I really don't care for the chisel grind. I have to agree with the folks who say it doesn't cut as well as it should.
The others are all a bit longer than I would want, although that is clearly a matter of personal taste and comfort.
Several people have mentioned the Arclite. I think it's a great bargain, but I have never felt entirely secure with its grip. A hard thrust would probably leave me clutching the sharp edge. For other uses it does quite nicely.
I would also like to second (or third) the suggestion that you look at the Rob Simmonich Mid-Tech Bitteroot. It is a
lot smaller than anything else I've seen, but it sure does cut! Think of it as a short Exacto Knife on steroids. I have problems with my sweat corroding blades, so I am really glad to finally have a Talonite necker.
Best of luck!
--Bob Q