If you're looking for an eye catching desktop backgound why not try this Broken Aero Vista Black Wallpaper? It takes the Vista Aero look and adds a broken glass effect, so at first glance your monitor appears to have a big hole in it.
It's a high quality image with 1920 x 1200 pixels. It's large enough for most screens, and doesn't suffer too much if it's stretched or squashed. However, it would have been preferable to have more screen sizes to choose from.
Broken Aero Vista Black Wallpaper is a dark, striking, bold image for your desktop.