What camera solution for filming snowboarding?

I have a Nikon d3200 but no waterproof case for it. Should I search around and buy a waterproof case, stabilizing rig (handle or other) and a good fisheye lens or would it be more in my interest (and cheaper?) to buy the new GoPro Hero 3 for filming snowboarding?

Added (1). By "filming" I mean taking video, it's just a term. Also, I'm limited to a 600-700 USD cost.

Keep in mind, if you want film that's very expensive. If you don't want film then don't ask for film… Ask for video.

A "decent" housing and lens port will easily set you back $1, 200+, and a decent rig is another $300+.

If it was me, I would consider (in order of price)…

Sony HDR-GW77V Waterproof Full HD Camcorder… $700
V.I.O. POV. HD Digital Helmet Camera System… $600
GoPro HERO3… $400.

Go pro 3 as easy as that

I guess you may need a waterproof camera check out this link it may be useful u'll find few reviews for the best waterproof cameras on the market (at least it's what they say on the amazon reviews lol)
http://thebestwaterproofcamerareviews.com/