I obviously am in the minority, but for me I do not like the looks of the Caly 3 or 3.5.
I know it is a great knife from all the feed back, but I can't see how it would beat my Stretch! The Stretch is just the perfect knife size wise and fits the hand just perfectly!
I would go with the Stretch, but if you have the funds get both! I don't have a Spyderco that I don't like!