I am getting a G5 1.8 Powermac tomorrow that has two HD's that are 75 gb each. In will need more storage space so i was wondering whether I should replalce one of the hard drives with either an internal or external drive. The questions that I have are: 1. Will I take a major performance hit if I go with an external firewire drive over an internal drive. 2. I know I need a serial drive SATA instead of other drives. Do I have the same limitations if I go with an external drive or can I buy any raw drive and put it into an enclosure. Thanks for any help you can give me.