go pro HD was £300 when mine was brought for me but that was when they had just come out. Not sure how much they are now, check on www.dogcamsport.co.uk they are great to deal with and sort out any problems rapido if you have them. The clip that locks the case broke on mine, my own fault but i didnt say that, and they replaced it for free. Always answered any of my questions quickly.
Youmay want to look at the contour too, i have one of them aswell. Much easier to start and stop recording especialy when wearing gloves. The only thing i’ll say about that one is dont use the goggle mount, its crap. I still need to get a better helmet mount for it actualy.