Replying to Look pivots

Hey guys, I recently got some new faction prodigy 1.0s (181cm) and I need to get bindings. I am trying to decide between the pivot 12s and the pivot 14s. I am 6'3" 175 pounds and still growing, I am an intermediate park skier (3's 5's off jumps and some 2's off rails). I have my dins on my old bindings set at 9.5, but I know I will need to move them up in the future. just wondering if the pivot 12s would be good or if I should spend the extra $ and get the 14's.