I don't know why you need 60 FPS. Especially at night, 60FPS will gather half the light per frame as 30 FPS, so your video is going to be pretty bad.

60 FPS is never necessary for "witness" video - heck, 15 FPS is probably good enough.

As someone who's now on about his 8th camera, right now battery life is pretty much my major consideration. 1080p is a given, 30 FPS is good enough, most cams are small enough, but having to charge every ride is a pain. Swapping batteries every ride is a little better but still a pain.