I have two main requirements.
NO wind noise, you can't hear the Engine/Exhaust note with all the wind noise.
This is why I was thinking of a remote mic.
Two, being able to mount it on my helmet.
I'm keen on getting as close to real life riding as possible so think that if the camera is close to my eyes, you will see what I'm seeing when riding.
Initially I thought a box type unit like the GoPro may be too much drag on the side of my helmet, maybe, maybe not.
But surely there are small, bullet type camera's out there that would offer minimal drag.