Hi,
You've gotten some very nice results there... I think the composition looks a lot better with some more grass in the foreground, as well.
I'm not sure if you're aware of this technique, but there's a way to blend many shots taken at different exposures on a tripod to create an HDR image in Photoshop. I'm not sure if it's true HDR, scientifically speaking, but the results are fantastic.
Basically, you mount your camera on a tripod and compose, take several shots at different exposures ranging from extremely underexposed to extremely overexposed (exposure bracketing works well for this), and then import the CR2 files into Photoshop using the "Merge to HDR" function. You can get some pretty amazing results from this.
Here's the tutorial over at Photo Tuts+.