sound quality is still there (not as good as the rest, agreed) but that's just an excuse to throw down some background music on your footage. Picture quality is the main thing. The gopro seems to include the most accesories like all the mounts and waterproof box etc where as all the others have to be purchased seperatly. Just comes down to budget I guess, the best of the lot like posted above would be the $475 radcam.