ATFK is pretty cool. I also like the cqc-13. I'd go with one of those, depending on what size you're more coomfortable with. I had a 13 and love the design. Your hand wont be slipping off of it for sure (just about all emersons have very secure handles though).The wave is nice to have, I'd give it a try if you haven't yet. I also like the way the ATFK feels in the hand. I have no experience with the button lock though, but haven't heard too many bad things. It is a significantly smaller knife than any of the Emersons you've listed. The smaller mark is also a cool knife. I once played with one for a bit. Fits the hand surprisingly well considering the looks of it. It too had a button lock. The smaller mark is a bit bigger than the atfk iirc, yet a little smaller than those emersons. I think it is tip down while you have an option with the atfk. The larger mark is on the bigger side even compared to the emersons I believe. There is a video of it in hand on the blackhawk site. Pretty much a monster. The emersons will be easier to carry, and still offer plenty of blade. As someone mentioned, the mini commander is a good smaller knife also. It's still as thick as the full size emersons, just shorter. It might be worth a look if you like emerson, but want a smaller blade.