I was looking for helmetcams a while back and If I am getting one it would be this baby here.
Or one of them at least, has everything for 630$ good quality camera (check out their videos) has the DVR and the nice crushproof mount. That cam is what Tiger from webdog radio uses. He talks about a bunch of them here (first video).

I have a lapco offset sight mount and I think I'd try to mount it on the side weaver and run the cable on my stock and have the recorder in a pouch on my back...

P.S. Tiger has a bunch of really good footage on his site and some good tips/tricks check it out here.

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Proud to be Canadian! Maple Core Captain
Gear: Vents avatar goggles with amber lense, Marpat BDU, Marpat boonie hat, Marpat MOLLE plate carrier, Canadian army surplus tan boots, Ariakon Overlord with hip holster, Xtreme rage gloves, Crossfire 68ci hpa tank, remote coil with slide check, Midland Radio with throat mic.
Marker: Tippmann A5, X7 hopper, Freak kit, Opsgear G36 folding stock, Lapco offset sight mount, NC Star 1x40 red dot sight, TechT complete cyclone kit, polished internals, JT tactical 3point sling.