The Spydeco Citadel 83 is one sweet auto knife. I prefer the 83 over the bigger one only because I like to carry most of my knives in my front pocket. The two knives are the very same just different sizes. Things I like about the knife;The spring is super strong, the blade shape, tha fact that the safety is close to the automatic button, I love the texture of the handle it's not going to mess up your pocket but when you need grip it's there, and last of all it's a Spyderco knife... they always do it up right.
Top 5 Auto Knives of all time. 
