GoPro Hero3 Silver Edition
My friend has the Gopro3 Silver edition and I have the black edition.
After looking at the photos and videos, the black edition looks much better. Possibly due to it having a 12MP Sensor and better ISO etc..., than the 10MP Silver edition.
The black edition can also record several higher resolution videos than the Silver. e.g. 2.2k and 4k.
Battery life for my Black Edition version is terrible. From a full charge, I don't think it'll last an hour at 2.2k recording. It may last longer, if recording at lower resolutions.
You'd probably need to buy a handful of spare batteries, if you are gonna be out for some hours.