The delica 4 is about half the price of the caly 3 but it has the same steel, similar shape, and weighs a little less. If this is your first spyderco I would recommend you try the delica first. You'll get one hell of a good knife at half the price and it will give you a chance to find out if Spyderco's are for you. With Spyderco you either get it, or you don't. I knew the first time I picked one up that Spyderco was for me, but some people are polar opposites and can't stand the funny shapes and thumb holes and such. Personally I rarely carry anything else because my Spyderco can do anything I could ever need or expect a pocket knife to do. they tend to be slimmer and lighter than other brands without sacrificing strength or durability. besides, at $40 for a delica I'm not terribly worried about abusing the hell out of them. Even so i've never had one fail on me.