I purchased a Go Pro Hero several months ago and more than happy with the results. As for audio, mine only has an onboard mic, but at relatively close ranges, it does a great job. The lens is ultra-wide angle, which means that everything is always is in sharp, clear focus, and the camera can be fairly close to the keyboard and still capture you and the equipment on the video. You can purchase a special cable for the Hero3 camera that permits you to connect an external mic via a 1/8 jack. This camera does NOT have a view finder, and does not need one because of the special wide angle lens.

Go Pro Hero 3

Good luck,

Gary