I have a Mac Mini and my hard drive is almost used up so I need to purchase an external hard drive. I have been considering 2 models: The Western Digital MyBook an the Iomega 500GB Mini Max. The QUALITY of a product is very important especially since it's a hard drive. Which external hard drive model should I get that will work with my Mac Mini. Should I get one with FireWire or USB? Also, should I order from the Apple Store, Mac Connection, or Amazon?