In the big picture, none of the cameras mentioned aren't bulky on your head. Wanna lose the bulk? Get a POV... Tiny camera taped to your helmet but extra large battery/memory/lcd unit somewhere else on you, plus the most expensive of the bunch. Cameras are personal preference. My opinion they all record just about the same quality picture as long as the cam is a high def. Differences come field of view, remotes, armour ect.
In the end, no matter what cam you choose, all your friends you show the videos to that don't climb trees are gonna be ooooh'n and ahhh'n over 'em. And the ones that do climb trees... watch out, here comes the criticism!