Hiya guys, i need an external HD for my imac, i want the mybook by western digital, well, mainly bacause its very imac like in looks lol, and its a good price, anyhow, ive looked about and some places say its firewire 400 and others say 800, I need a 500GB one, doe the firewire 800 only start at these higher sizes?, also, if you have one post your experiences with it, id love to know what its like, thanks guys