Hey. I wanted to know what you guys think of the clear plastic cases like the Invisible Sheild, BestSkinsEver, and Bodyguardz. Do those offer good protection from scratches and dirt? Or is the Incase Slider case good? From the reviews on Apple's website it seems amazing. It got 5 star user reviews and it's only 1mm thick! here: http://store.apple.com/us/product/TT967LL/A?fnode=MTY1NDA0NA&mco=MjQyMDMzMww So, what do you think ofers protection from scratches and is VERY slim and light? Thanks in advance.