Have GPro HD - (only consider HD2 if gopro) lots of others on the market too!!
driftinnovation.com/ + v.versatile, hard to kill - indestructibly tough, good battery life, good range of mounts, when in action it is set and forget. It is simple.
- single focus fish eye lense 1:1 so zone of interest is limited (alot of boring stuff when kitesurfing - basically the rider), if U R serious about securing to mounts then hassle working out if on or not i.e. U are most likely to turn on at beginning of session and let it run, fish eye effect can limit what U can get out of photo in editor. Condensation is a hassle if U have forgotten to setup for water / snow environment - invariably in the middle of the case lense!!, any review is after download - (U can get accessory screen now but realistically none of these cameras are designed as tourist type they are for action). There R 2 buttons period. The user interface is a set of abbreviations -
(most negatives have been improved on HD2)
I have yet to use the wrist mount to follow (fairly closely) and film my son riding.
I would like to try the HD2 to test if the higher definition / receptor size gives better resolution - the promo' video looks awesome - but the slick factor is out of my league.
Because of the quality limitations tend to use it less and less for fun, just specific recordings.
The best shots have been hand held or on an extension pole - much steadier. A video on a helmet makes U realise how good your eye/brain handling is - the results are mostly very jerky - U learn to move your head less and eyes more!! The time lapse is better. Had interesting montage effects from time lapse when skiing - not on the slope but walking around in the lifts etc - one set by mistake when went into a mini-mart with it still running.
The image stabilising software I use sets the center of the picture as stabile and moves the frame accordingly - to limit the distraction from the edge of the frame it clips the viewing area - resulting in some better and some rubbish footage.
I have not used the contour - have read reviews very large footprint overlap - each have nifty features. When skiing Contours mostly mounted on side of helmet - this position gives a smoother video - and easier to capture what U R looking at. To use a Contour in serious water environment kiting/windsurfing/wake boarding/surfing would need to buy the waterproof casing.
I would buy the one which gives the highest definition shot.
HD2 > Contour
HD < Contour
GPS?? Adds another dimension - allows movement / time when traced out on PC but otherwise unless racing / plotting regularly would put picture quality way ahead of anything else.
Cheers
AP