For me it has to be the ZT 0454. I knew I wanted one, I expected to like it, but I really didn't think I'd carry it that frequently. I figured it was just too big for my carry routine--except it isn't, it carries small for a 4.1" bladed knife. On the days I'm not carrying a Southard, I frequently find I'm carrying this guy: IMO, this thing is a fantastic design. I find it carries much, much, much better than the 0777 does, and it feels fantastic in use.