I've never seen one, but I do use the RF-1000, which DuHamel wore before. It's a nice helmet, and I'm guessing the Shark must be damn nice too, they probably can't afford to get Miguel to wear a lesser helmet on endorsement value alone. Yates and Spies seem to like their top end HJC helmets just fine. I've only worn their cheaper one, and the Shoei is much better.
I've been wearing a Shark RSF2i for the last 2 months. Absolutely love it. Very light, soft padding, great ventilation, non fogging clear shield (smoke shield I have does fog, but throw in the included breath guard and problem solved). If it fits your head, I would definately recomend one.