Disclaimer: Haven't read the trilogy, but will when it comes in through the library.
Nickel.  Tin [/edit]
Knowledge is power, and senses provide that knowledge. Can I kick the door down? Why do I need to, when I can *hear* and *feel* how to pick the lock? Can I deal massive damage? Why bother, when I can tell the authorities where to dig to get that individual locked away, legally? Can I survive being hit with a tree? Why, when ample knowledge the tree is coming allows me to not be there? Tin[/edit], all the way.
The only reason I might choose  Pewter [/edit] was if it offered Longevity. Compound interest is the strongest force in the universe (although stupidity usually wins by overwhelming volume).
 Yup, dangers of posting late at night. Dental victim of my own size 11s. [/edit]