For the wind noise problem, you can get a plug in mic. it plugs straight in to the speaker plug and has a silencer on it, they work very effective.
It has no leads and just sits snug with the body,
You need to use the case with the cut outs in it, not the waterproof case.
Heres a link to an example on eBay, its not the one we have, but will give you an idea
http://www.ebay.com.au/itm/GoPro-Mic...item3f1e585ccc
p.s. its amazing what you hear when the wind noise is gone.
regards
Dave