Hi all. I have an older Firewire backup HD I was using on an iMac 2.16 core 2 duo. Very good computer for 4+ years now. I now have a 2.5ghz core i5 iMac. This one has different receptacles on the back. No firewire 400 which was what I was using. It does appear to have a firewire 800 port I think. It also has a new port for me. Thunderbolt. What do you guys think? Get a new hd case for Firewire800 or look for one with a thunderbolt port on it (if they are even sold now) I want to take the backup from the older imac to the new one to get all that data and such I would hate to lose. I just dont really understand the new standard I guess. I imagine FW800 case would be cheaper. Thanks.