dins past twelve are insane unless your just super pro or just like the hulk. there was an article in powder magazine about seth morrison and if i remember right he starts at din 9 at the beggining of the season and then works up to 14 for stuff like ak because "you dont want your shit popping off in ak". the lower din binding are definatly the better value, im not sure about head but most other bindings like griffins and jesters are exactly the same just with different sized springs. comapnys that make bindings that have like 18 dins are ridiculous. most really good skiers out there arnt the size of michael moore.