I will be receiving a 20GB iPod for my birthday (yay!). Regarding cases, I have been researching in the forum and the recommended links provided and am deciding which iPod case to buy. Which do you think would be best? I want to be able to protect the iPod from scratches if possible and be able to operate it with the case on. The Radtech, Marware and Belkin cases look good. Any recommendations? Thanks !