Originally Posted by Eric F

FWIW, my Procaliber is a M/L. A friend of mine had a M Supercaliber (same TT length as M/L Procal), and it fit me fine, too. You're a bit taller than me (5'-9", 32" pants inseam). More so than any other type of bike, I find a smaller frame to be a plus on a MTB. Space to let the bike move around under you is a good thing.