I am looking to buy an external hard drive for Time Machine and such. But I'm not sure whether I should get a FireWire or a USB 3.0 one. Clearly, in my present situation, FireWire would be much faster - and easier, as well, because it won't take up a much-needed USB port. However, when I upgrade next year, Apple will (hopefully) finally put USB 3.0 in their machines. And with Thunderbolt on the scene, it seems FireWire is on it's way out. I don't want to be forced to use USB 2.0 because FireWire is no longer available. Which one do you guys think makes sense - a USB 3.0 hard drive or a USB 2.0/FireWire 400/FireWire 800 hard drive? The latter is $50 more, by the way.