For what you want, I would say drift ghost FTW. It has the screen, the others don't. I have a gopro hero 3 black, and while I LOVE the 120 fps 720p shots, I don't get to use it enough for it to be worth it. You can do plenty of good slow mo shots with 60 fps.
For what you want, I would say 1. Drift Ghost, 2. Ion Air Pro 2 w/ wifi backpac, and 3. Gopro Hero 3
The drift does look heavy, but if it is light it definitely wins.
I haven't had any real issues with my gopro other than battery life in extreme cold (0F), but a few extra batts (2 + wall charger for 30 bucks on amazon) solved that issue.