You can get the White edition from Play.com for £155. The others you can get slightly cheaper in the UK with a bit of shopping around but might still be cheaper buying in Asia.
figure the Asian ones are genuine? look into veho muvi hd10, from tests it seem to beat gopro2 a bit in picture and by far in sound, comes with built in display, accessories and is still cheaper. I got the hd7, wouldnt recommend buying it thou (picture isn't that nice, everything else is good thou)
Get a Contour instead, the company have closed down so you can get the top range one for as little as £60 on ebay. Just make sure you get a BB shield for it as well, 'cos if you crack the lens, you're not getting a new one.
Quality is comparable to the GoPro, Contour were their closest competitor though most airsofters prefer the Contour anyway.
I have a contour + 2 and GoPro hero 2, Hero 3 Black edition defiantly not comparable. contour loses a lot of it's detail and over saturates everything.
Wait for the Garmin VIRB! It's even got a heart rate sensor overlay!