OP, regarding difficulty unclipping due to limited angle mobility , that is easily solved with low float. You have to be sure to get your cleats angled right so you don't screw up your knees, but then having zero float cleats (black for Look Keo) assures you nearly instant unclipping with very small rotation. If you need the insurance a little float provides, systems with 4 or 5 degrees shouldn't cause you a problem either. Like the gray Look cleats.