I'm about to purchase a macbook (black or white I'm not sure), and really want to keep it clean and pristine for as long as it lasts. If I have a cover or protector on a white macbook, the discoloration won't happen right? It's just from contact with the wrists, and not exposure to air??? What are the best covers, skins and protectors for the preservation and aesthetics of the macbook? -Moshi Palmguard: http://www.aevoe.com/moshi/palmguard.htm -Best Skin Ever: http://www.bestskinsever.com/servlet/the-Lap-Tops-cln-Apple/Categories this seems to be the best because it covers every part -Speck Plastic Protector http://www.amazon.com/Speck-MacBook...?ie=UTF8&s=electronics&qid=1184541350&sr=8-12 I've read some reviews that said the protector scratched the macbook -Marware http://www.marware.com/PRODUCTS/Apple-Laptop-Products/Protection-Pack-Plus-for-MacBook Which one(s) should I get? Any other recommendations?