Best camera to buy for Extreme sports recording?

I currently record video on a Bridge camera but am looking to move up to a better camera as the video quality can be grainy, I record extreme sports so the camera needs to have high resolution, be able to attach fisheye lenses, i am looking along the lines of handycams (i.e. camcorders) and Dslr cameras, but am stuck with no idea of what to get. Preferably it should have hot shoe mounts built in, be light etc, and if it is a Dslr, it should obviously have video function, thanks in advance!

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