John,
It's a very nice serie. I like the "rhythm" of falling water. The first one is a bit more abstract and mysterious than the two other images. In the second one, the bottom left corner adds realism and one can immediately and definitely identify the scene. The third (colored) image is different and I like the purple hue and the gold colored rock reflections behind the water curtain.
If I had to choose one, it would be the second one but only by a very slight marging.
Congrats!