I think you have a very good shot here. I like the original crop but prefer the color correction jgredline did afterwards. In the original crop, the sky helps keep the scene open with room to breathe. although it is only a sliver of sky, I like it better than without any at all.
I'm thinking that getting down lower and opening up the shot a bit more would have gave the added benefit of the wonderful surroundings and the sky that seems to have some cloud definition. I agree with Aaron about opening up the scene..
Still, a very nice shot.
btw, I myself shoot with the intent on getting the scene just as I want it with no crop if I can. The 10 mp out of my Rebel XTi is not nearly the resloution I would like to have, so, in no way do I want to reduce it even more with a crop. Of course, if later on when viewing the shots on my computer I see a crop will make or break a shot, it's good to have the tool so readily available.
The thing is, you should take lots of shots of a scene like this from different angles and different compositions. This leaves you with a greater chance of nailing the one that will frame on the wall.