Are you trying to decide what computer to buy or how to upgrade the one you have in order to use it for Video Editing ?
You came to the Right Place !!!This article will try to explain what to consider when choosing the parts for a computer based video editing system. It will try to cover all the subsystems of the computer - Including Hardware and Operating System considerations and Explain how each one of them is related to the Video Editing part.
Top Firewire Cards
http://desktopvideo.about.com/library/weekly/aatp_firewire.htm