Mountain Biking Helmet Cams

Should i buy the GoPro HD Helmet hero cam or the GoPro HD 960?
ill be using this camera for mountain biking. i hear that there isnt much diffrence between 960p and 1080p, but the 960 comes without the option of attaching the LCD BacPac and 720p @60 fps.
the Helmet hero is $240 and the 960 is $180. considering the trade offs, which one is worth the money? is the lcd bacpac even worth buying since you dont even see it while riding?
if you are going for a mountain biking where you would better wear a safety helmet and considering the endurance of the device i will recommend you to use gopro hd helmet compared to gopro hd 960, the price is not too different, considering the video quality and safety.
Forest Hill Park Mountain Biking Helmet Cam

