A few friends have the GoPro, always looks good. I've sold hundreds of them and nobody ever complains. Make sure you get a fast enough card if you go Hero 3 Black. 30mb/s isn't fast enough. A lot of people have had issues with the camera locking up. That's about it, card related though.
They are listed as runout though so keep an eye out for a Hero 4/new version soon. No idea what they're doing yet though.
Just ordered a Canon F-1 from KEH. Picked up a 35mm f/2 off eBay from Japan. I wanted something smaller than the 1N since I'll be spending November in the States and want to walk around with it all day. I should have gone back to a Nikon FM2 or something lighter, but I've never tried the Canon 35mm mechanical cameras so it should be a bit of fun.
If anyone is interested I've got still got my Bronica SQ-AI kit up for sale. And a Leica M4 + 50mm Summicron. Need to move them in the next couple of weeks.