So I've expecting to buy an iMac pretty soon and I have a question, what is the best external hard drive for the Mac? I'm looking for at least a 1TB external hard drive that supports FireWire 800 and USB 2.0 that's cheap and reliable. I'll be using this for media storage (pictures, videos, school docs) and Time Machine. For Time Machine, do you have to have a hard drive that is bigger than that current hard drive in the iMac? Or are you fine with something smaller? Curious on that question. Also, I keep on hearing that Western Digital hard drives like to fail... Is that true? Other than that, what hard drive would you recommend? Thanks!