I bought the 2.16GHz C2D MBP.. I'd like to upgrade the HDD.. What is the biggest HDD I can buy to install? What type of HD should I look for? I'm a Mac noob :hs: I plan on buying a WD WorldBook TB firewire drive.. just haven't ordered it yet. I'd like to get a large HDD internally as well.. couple hundred GB, if I can..