rgnsup r5 forward will produce a higher definition vid and a narrow degree angle which will reduce a little of the fisheye effect. r4 at 960 isnt bad anything below that gets wonky but a LOT of surf vids i've seen utilize that effect.
the 2nd half of this video shows what happens when you turn the camera to face forward. its just annoying and you cant see much. chest harness/head view is the way to go with surfing it seems (since using it in the hands is too tough)