Ok, I've owned and used all the knives you mentioned. Here's what I thought of 'em:
Emerson Commander - ATS-34 blade, Titanium liner lock, G-10 handle. I thought it was a very good design, and it is well constructed. It is very secure in the hand in a variety of grips. I liked the recurved blade shape a lot - it seemed like it cut like crazy! The wave opener is one of the coolest opening features to come out in a long while. Pull the knife from your pocket and *boom* it's open! Too cool! I didn't like how thin the liners were even though they worked perfectly and kept the handle rigid enough. It just didn't have the "overbuilt feel" of some knives. Also, the chisel grind may not be for everyone.
Buck Strider Spearpoint - ATS-34 blade, (THICK)Titanium liner lock, G-10 handle. This thing is built like the proverbial brick sh*thouse! It has very thick liners, a very thick blade (for a folder) and thick handle scales. It is just overbuilt all the way around. The G-10 handles are very rough and they will tear the crap out of your pants! (I have 3 pairs of jeans with ragged pockets and a pissed off wife to prove it!) The thing is so tough you can do practically anything with it. If you want to pry or dig or maybe even chop something with a folder, this would be the right one. Even though the handle is not very ergonomic, the knife felt great in my hand. You should get this one if you want an extremely overbuilt knife that doesn't cut as well as the others, but will stand up to tons of abuse. I really can't explain how huge this knife is... you've just got to hold one and form your own impressions. For me it was way too big for it's purpose.
BM 710 - ATS-34 blade (in my case), Steel liners, Axis lock, G-10 handle. This is a great knife! It has an absolutely excellent blade shape, great ergonomics, and one of the best locks ever. I feel like the axis lock is sturdy enough that I can trust it not to fail. I have really worked mine hard and it's still tight as a drum and silky smooth. The slightly recurved blade cuts like a demon. The handle is very comfortable in many different grips. (not as secure as the Commander, but very comfortable) Overall it's a great knife! I highly recommend it, and it is my "pick of the litter" for your question.
Kershaw Boa - CPM440V blade, aluminum handle, liner lock, speed safe assisted opening. My wife carries one of these. She uses it a lot and the blade NEVER seems to go dull. I have only had to sharpen it once, and that time it didn't take long. The blade shape makes it a wicked slicer, but not so great at stabbing things. The handle is comfortable, especially if you have small hands. My wife's Boa has the multicolored handle and it doesn't seem to draw much attention. People seem to think it's less dangerous since it has a brightly colored handle. The torsion bar assisted opening makes it a highly addictive knife. It has a "flipper" on the blade that flicks the knife open very fast. It has a great blade steel, it's very well constructed, and the speed safe gives it high marks for "gadget factor".
There are a few knives out that compare with these knives, but there is only one that I would recommend above all of them: the Al Mar Sere 2000. Even though the knives you listed are VERY good, if I had it all to do over again, I could have just bought a Sere 2K and been happy with it.
If I had to pick only from the knives on your list I'd go with the BM 710.
