Hey new member here. I have an original gopro HD hero and love the video it shoots, only problem is that the sound quality is just terrible. I mostly do motor sports activities with the gopro and I can't ever hear the engine (wind noise). I would like to run a separate mic to pick up sound better. I realize that the original HD hero doesn't have an external mic plug in like the later cameras do, so I will have to run a separate external mic and edit the sound into the video later. What are some options for brand and model of mic that others have had good results with?