Want to buy a camera to record when riding. Rides usually 1.5 hour to 2 hours. Never used a GoPro but I have $500 credit at cabelas and am trying to choose between the hero4 silver or black, hero5 black.or the sessions. The hero4 black is more expensive that the hero5 and I'm not sure why.

I bought a fly6 yesterday and a k edge Garmin/GoPro mount yesterday. What do you suggest