Hey so I've decided to buy an external HD for my PB and really like Lacie's external hard drives. I am, however, having trouble deciding on whether I should buy Lacie's F.A. Porshe designed hard drives, a regular d2 HD or a firewire extreme one that includes firewire 800. I am about to buy a new PowerBook 15" 1.5 Ghz that will come with FW 800. I suppose it comes down to whether I need firewire 800. Will Firewire 800 really be a noticeable improvement compared with regular firewire and will it be worth the extra cash?