Just one mans (and sons) opinion Mike. I honestly think the M-11 is a flimsy POS. That said, I bought into the hype as I was desperate for anything that would protect Mitch. He went to a Bauer 9900 and personally I think it's a hell of a helmet.
Whatever works for your son is what is important. Like my old man always said, "do what you think is best".
A couple of looks at the 9900.
http://www.youtube.com/watch?v=2b9-GhnR4b0
http://www.youtube.com/watch?v=4rv6y...eature=related