Greg C , the Go-Pro black has 3 settings , narrow , wide & extra wide , plus all the new Go-pros have a Flat port over the lens which lets them focus underwater.
t457118, This was shot on the white and looks pretty nice shot at 1080 x 25p , parts of it are slowed down , even imovie can help smooth this out , just don't slow it down too much. 25p & 50p is fames per second so yes it will be smoother shooting 50 fps when you slow it down in post production but it takes us twice as much space on your card and punishes your computer.
Keep it simple and just shoot alot

2.08 - 2.30 is slowed down and looks pretty smooth to me (shot at 25p)