Hi, I've been looking for a good case for the iPod 5G (I have a 30gb white one). I like the idea of the InvisibleShield, but I don't trust myself to install it. I looked at the Contour cases, but I have two questions - first, are they good? Or do they actually scratch the iPod? And second, what's the difference between the Showcase and the iSee? Which one is better? Also, if the Contour cases aren't good, then which cases would you recommend? I'm mainly looking for a case that will protect the screen and isn't too bulky. Thanks.