I'm looking for an external Hard Drive for my MBP. I have a couple of questions... First, is there a big difference in speed when transfering files to the HD between Firewire 800, USB 2.0 and 802.11n (yes, I'm considering time capsule as well). Second question, does the HD speed makes a big difference?? for example, if I use a 5400rpm HD with FW800 and a 7200rpm with USB 2.0, which would be faster?? And the last question, how well does TimeCapsule perform?? The HD I'm currently considering are: -LACIE RUGGED ALL-TERRAIN 250GB EXTERNAL FIREWIRE 800/FIREWIRE 400 & HI-SPEED USB 2.0 HARD DISK 5400 rpm -LACIE 500GB EXTERNAL HI-SPEED USB 2.0 HARD DRIVE - DESIGN BY F.A. PORSCHE 301103U 7200 rpm -TIME CAPSULE 500 GB any additional advice???