I've owned two and a half of the above, (don't own a 710, but I currently carry an 806 Axis as my EDC)
I've actually owned three Al-Mars SERE's, and traded 'em all off. Guess they were kinda boring. All they did was cut like mad...

it really had nuthin' wrong with it, other than the fact that it wasn't very quickly accessible, as it rode so deeply in the pocket. Gotta remember, it's a trade off though. Get one that rides higher and is more accessible it may be more prone to loss and becoming an object of other persons insecurities. It was really VERY VERY smooth, sharp,rugged, and one heck of an EDC.
Had a Spyderco Military. Biggest thing going for it was the huge opening hole, and it was so incredibly well mannered for a large knife. It could do smaller more finite jobs incredibly well, was light, and handy to carry, also cut like mad on carpet, insulation, cardboard and so forth. Downfalls were that I thought the CPM 440 V was too darn brittle for my tastes, although sharpening was never a big deal. Didn't trust the lack of metal liners at the time, although now, I would. Also rode quite high in the pocket.
my 806 is a damn nice knife that has very decent manners, cuts well, and operates smoothly. Downfalls are that I find it to be a pain to sharpen, and I don't much go for the smooth edge. Like the toothier VG-10 better. The Axis Lock is very cool, my only complaint is that it puts more moving parts, springs, and gadgets in the knife to let me down some time when I'm a couple hundred miles in the middle of the boonies. Guess it's kinda a trust issue. I don't feel liner locks are as strong overall, but I do like the simplicity of them.
I'd be darn glad to have the SERE or the Military brought back into my EDC rotation. If yer lookin' for a bona-fide answer though, I think the SERE is the best culmination of all the qualities I'd be lookin' for.
I've now vowed that if another SERE comes my way I will NOT trade it off, no matter how bored I get with my toys...
