I just got a a Mac Mini and hope to be able to edit some family videos and make them look pretty. My question is how necessary is Firewire as the data drive? I purchased a Seagate FreeAgentGO 160GB external a few months ago on the cheap. It's a 2.5" 5400RPM drive and was thinking of using that. But I've read a few posts indicating that firewire, especially now with firewire 800 being available, was the way to go. So will the USB 2.0 Seagate drive I already have work, or will it be a significant handicap?