Ok so I'm very likely about to buy the new upgraded 15" MPB (what I need for work). I'm looking into running windows on it for gaming and so forth that I would only do when I'm at home. My question is whether or not I could install Windows and WoW on an external SSD for improved performance, or if that would be unhelpful and not as beneficial as just partitioning the 7200rpm 500GB internal HD and running WoW that way. Thanks for any advice on the best ways to improve performance.