I have a MAC G4, Mirrored door model, 1.25ghz computer. I am thinking about buying Final Cut Studio 2. What specific video cards are compatable? I see Quartz Extreme listed as a requirement but I want to make sure the model number of the video card I am going to get is really going to work. Anyone with specific recommendations/ manufacturers/model numbers etc? I am going to a computer show this Saturday and need to know what to look for.