Make sure you're clear about your local knife carry laws. Sub 2.5" blades are usually acceptable. There aren't that many keychain knives that are good. Besides the two I mentioned, I suppose you could add the spyderco jester and ladybug, but what's good about the dragonfly is that it afford you a comfortable full hand grip because of the integrated choil. The subcom is much shorter but it's wide and has a huge choil so your grip on the knife isn't going to go anywhere and the width makes it easier to control. I don't know of any benchmade that can do that, it's not the direction their knives take. Besides, the only benchmades in this ballpark are the pikas and mini-ambush, none of which are keychain sized and don't have the ergos of the dragonfly that mrarroyo linked. If you're going to move up out of the keychain world, then the options open up, but I still think the subcom f is worth owning because it's just too cool.