I think with the Sjcam there are a lot of knock offs around, or so I have heard anyway. So make sure you buy a genuine one (how you do that I dont know!).
I too am looking for something after my Drift Stealth2 died and company are not prepared to do anything about it grr
Mate came off his bike Monday after braking to avoid a car pulling out on him, drivers insurance have already paid up after he sent the footage to them which underlines the importance of these cams for me (however, he has the £250 cycliq12 which while I would like is out of me league)...so the hunt goes on...