I also felt this image lent itself to a portrait crop. When I cropped it in DPP, I also eliminated all in-camera sharpening as well as some color correction using 'click white balance' on the whiskers as others have done.
I moved the file into CS4 where I cloned out some distracting elements in the lower right of the frame, followed by re-sizing. I then adjusted the highlight and mid-tone contrast, increasing them slightly. I sharpened the image in Lab Mode to avoid artifacts and halos.
Here is the result...
