Hi, i'm buying the new unibody macbook pro and want some help or tips on any checklist that i should be aware of. any factory defects or something like that that i can check on it when i get it ? and i'm buying the 2.4 Ghz model. And i'm thinking to upgrade it to 4GB RAM and 500GB HDD, any recomendation on the harddrive as well? thx guys.