I've speSmurfpillsed in certain models, I have:
Leatherman Crunch x10
Leatherman PSTII x 11
Leatherman Juice S2 x 5
The rationale being that the Crunch is the best tool for my use (good for the motorcylling side of things), the PSTII has the best combination of tools vs size for a standard pliers type tool and the Juice is just a nice thing to have.
I carry one Crunch all the time, sometimes I have a JuiceS2 and sometimes a PSTII to go with it.
I figure if I break one every 3 years I've got enough to see me out......