This one is a real treat...surreal yet easy on the eyes. I'd like it better (if that were possible), if you put it into photoshop (sor something like it) and straightened out the horizon line.
I like the colours in this, although I can't quite figure out what's going on with the lake. Is that mist over the lake? It looks like it to my untrained eye.
It's great the way this image manages to be both active and calm and peaceful at the same time. The clouds really give it a sense of action but the overall effect is still tranquil.
I agree with sharonva about straightening the horizon line. I think that might really improve an already very nice desktop.