We at Wildcat did quite a lot of research and looked at GoPro, Contour, NFlight before we finally chose Drift in mid July '11.
Have a look at the quality of our vids on the website and the Blog page about the video camera selection process. It also tells you where to get them from. We are delighted with the audio and video output.
Aerobatic Display Team | Wildcat Aerobatics
Stik