GoPro is great, but a sterile image...no zooming. A high zoom capability can't be underrated for hunting IMHO.
I use a Sony Handycam...great zooming capabilities (55x), HD quality video, reasonable price(around 300 bucks). You also have the option of taking 9 MP still photos with it.
That being said...self filming hunts can be tough! I guess the advantage of the Go Pro is it is all hands free and wherever you are looking, you are filming.
Best of Luck, Jeff (Bowsite Sponsor)