This is an amazing little tool in Photoshop.

What this image has going for it is a very distinct edge, which makes it a perfect candidate for the magnetic lasso tool. I ruled out the background eraser because there were color variations in the background that were very similar.

The magnetic lasso tool detects and snaps to the edge of an object as you to trace along its outline. The Magnetic lasso tool options used for this image are shown to the right. The lasso width controls how close the edge you need to stay as you trace the image. Frequency controls how often points are laid down, and edge contrast helps you fine tune the edge detection.

As you drag along the edge of an object, the tool drops fastening points to anchor the selection.

Now you can either copy and paste into a new selection or invert the selection and delete the background. Add it into a new picture or use it any way you want.

This is also a great tool for adding faces to posters etc.