ideally dan, u want the top half of that photo joined to the bottom half of either photo 1 or 2. the GND will allow u to do this... or u can use HDR which will also do it. HDR is not good for moving water tho, so a GND is preferred.

saying that, i do like this one a lot better even tho the foreground shadow is too dark, the light reflecting off the surface water redeems it somewhat.