Ever thought about Drift?
I know that Visual Reviews (Paintball Channel on YouTube) uses them and they get some good footage, i've seen and used a Drift HD 1080 and they work brilliantly for the cost.
The battery life sucks a bit however what cam doesn't these days?
Swap the battery out in seconds and a new charged one in sorts it quick and easy and can record for hours with a 16GB Card!
Remote control, Wide Angle Rotatable (For all those awkward angles shots) Lens, Water Resistant/Weather proof aswell as Waterproof models to a small depth (3 Metres.) Easy to use LCD Screen, normal camera thread at the bottom for fitting to a tripod etc.
All the stuff you could want all from £120 - £300 if you want the Top End one.
Many mounting options, probably a better mask cam than barrel though due to the wide angle lens this is where a R7 comes into it's own along with it's mounting options!
However just maybe check them out if you haven't got one sorted already.
Check out Action Cameras (Dot Co Dot UK) for all sorts of brilliant cams and good prices.
I also know of a 10% off code if you decided to order to save you some cash.
(Just to mention all praise is given from my personal opinion, i'm not sponsored or endorsed by Drift or Action Cameras in any way. Although I should be a sales rep for them! haha)