Deep Blue HD Sample Video (Murky Water)
Delta Vision HD Sample Video
Delta Vision HD compared to GoPro Tm
You can see that uncompressed HD to the surface using a high end recorder does make a difference. GoPro is a fine product but for underwater clarity, and the ability to bring live HD to the surface in real time is a job only for the SplashCam line.
Delta Vision HD with Laser Scaler and 600 lumen LED Video Light (300 feet down)