I am choosing between these too.
From what I gather:
STH 12 - Strong, Middle Weight, Less elastic travel, Possible problem with '3 hole'' toe?
Griffon - Questionable but unproven durability, Light, Good Elastic Travel
Px12 - Relatively Durable, Heaviest, good elastic travel (but I have had pre-release problems)
Can someone clear this up and help me choose. 5'8, 135-140.. Mounting on Moment Jibs and/or Rockers.. Will be skiing hard.. all over the mountain.. no bigger than 40 foot jumps.. or 30 foot drops..