Well, if you don't mind a little input from a FNG to the group, I have everything listed but the SPAX. I've had the SP8 for about 3 years, the woodsmans pal (standard, leather handle) for 5, and 8 Kuks: 6 from Nepal ranging from 8" to a custom designed 16", one of the Cold Steel "bolo" kuks, and one from Smith & Wesson for 16 years in total. If I had to pick one... it would be a 12" Kuk from Nepal that I have. Thick, heavy forward balance, not too long, and lateral scalops along the blade length so things don't seem to "stick" to the blade as easily. It has a good working point, and I can hold the blade spine near the tip and the handle and use the whole thing as a draw-knife to do fine shaving type work. The other advantage of course with Kukris are they come with a burnishing tool and a small utility knife. I know they say you can sharpen with the burnishing tool, but it's best used to take burs and edge irregularities out between honing or sharpening. The blade shape of the 12" Kuk that I like is refered to as a Angkhola style, which is broader at the head than other regional styles. If you are ever looking to get a Kuk, look for something called a Panawal handle. It is a full tang handle, unlike allot of their handles, and originally from the Panawal region. It's also cross pinned. Very strong, never gets lose whether it's dry or wet. I also recommend lightly sanding off the high polish usually put on the handles for better grip. As for the other Kuks, I don't rate them in the same class at all as the Nepalese ones. The Cold Steel one is decent, though it chips and the point is completely rounded away from touching it up. It's still sharp on it's edge, just not much of a point to it. More time on the grinding wheel than I'm interested in with it. The Smith and Wesson was very disappointing. With the exception of the custom designed one, all of the ones from Nepal were equal price or less than the brand name ones. The custom was still under $100 US. Shipping to Canada took 5 days. Each are hand made too.
Sorry for the rant, I am a bit of a convert...
Second choice would be the SP8. It has a certain "bashability" to it, and the chiseling option is nice with the end. I did tame down the bottom curl of the grip to more of a nub. I found it was in the way of some grip positions, or at least made them awkward. The saw back works well, but does not self clean in green sappy wood very well, especially soft wood. It does cut, and make nice clean notches though for bushcraft that just can't be done as clean shouldered or quickly with any other tool I've tried short of a folding pruning saw, or a leatherman saw. It can also be used as a splitting wedge rather than an axe or hatchet by placing it on a piece of wood, and striking the top of it with another pice. Not as efficient as something substantial enough to chop with (I'm speaking of Birch, Maple, etc.), but can do in a pinch so long as your log length isn't too long. That would require another tool to block your logs to a reasonable length though. I will say that in an overhead stabbinb motion, blade-edge out, it does have more puncturing ability than I would have given it credit for. Just be aware that it will tend to want to follow the spine, rather than your angle of strike if the 2 are not in line. It can also be used for prying, but it's length is a limiting factor on how much prying you can really do. Then again, so long as you don't start adding pipes etc. to lengthen the handle, you won't hurt the SP8 by prying with it either.
Last would be the woodsmans pal. I took it on one camping trip and soon left it in the canoe. It does a few of the tasks reasonably well. Nothing great, and don't attack hardwood for any length of time with it. The blade edge just won't hold. It is completely designed for swinging, and does so comfortably. Don't ask for more or get creative with it. It doesn't like it, and you will become frustrated.
The SPAX would be an ideal tool to keep in a bug-out bag. It has a definite urban lean to it as a tool. Maybe even something to keep in your vehicle, but it is too short and too light to be a useful hatchet, plus the head is too narrow. It wasn't designed to do what most people envision it to, which is some sort of do-all survival tool. Though it would be to an air crew or as an egress tool for an emergency worker. It does have it's general uses, but it's limits. Think of it along the lines of a mini halligan tool or other egress tool, and it is now more in the right family than it is with the other knives and tools listed here. I'd consider this to be the orange among the apples compared here.
OK, well, that's my 2 cents worth. I guess I would definitely go with a kuk, but make sure you get the length, shape and weight that best suits you. I think that is the key, and also the nice option that aside from the woodsmans pal (2 sizes, 2 handle options, + and "extra long"), none of the others offer.
I did introduce myself, but every time I turned around, someone was always saying "Owen Kanyue do this.. Owen Kanyue do that...". It was just easier to change my name.
It's not that I dislike useless people. I just hate when they breathe MY air!
I am a student of the Archie Bunker Academy of Philosophy, Sociology, and Poli-Sci.