I also have many on rotation depending on my mood. My current, and most used one (of late), as a proud Evertonian is this, not bringing us much luck at the moment though.
I modified it to fit and changed the background colour to blue, but the upload a file button isn't working at the moment, so I'll have to try my best with google.
Another one I use is from a windows theme called Dark Skies that I downloaded, here is one of them.
In 2 months or so, it will be something like this.
That is one of my life long ambitions - New York at Christmas, see the Rokerfella tree.