GoPro dash cams

I bought a inexpensive dash cam to try and thought it was pretty neat. Not the best picture quality but still neat. Ok, what I want to know is what is the best GoPro dash cam to buy. The GoPro Hero 4's are out as White, Silver or Black models. From what I can understand is that the colors may represent better quietly, not sure about that or if its just what ever color you like. Know nothing about this stuff and understand even less. If you have any knowledge about this stuff I sure appreciate hearing what you think. We are taking the RTV on a little trip to play and kind of like to get one for the buggy.
Thanks, Harry

GoPro dash cams