Hi, I've got an Imac, Intel core 2 duo 3,06ghz 4gb of RAM and I was using pro tools but since the 8 version it is unusable with the i mac because of Firewire Traffic congestion. Pro Tools seems to refuses to have to FW devices on a same bus cause on the I mac the FW 800 and FW 400 are on the same bus. You get error every time you playback, it stops, cannot record or play instruments.... well cannot do nothing. I tried all the troubleshooting as possible and finally I heard that using an I mac for Pro Tools was a mistake, at least a Mac Book pro is a better choice because you have an express card port where you can connect a siig card to get a separate FW bus on a e-sata port for the hard disk. So I'm really thinking about buying Logic 9, I saw the new features and its looks like very good. But before buying I would like to know if I can use it on an I mac with my audio Interface (m-Audio Pro fire 2626) on the FW 800 port (via a 800 to 400 cable) and my hard disk on the FW400 port, or even daisy chaining from the FW 400 port. Is logic sensible to FW traffic congestion as pro tools ? will I get kind of strange errors or CPU loads with this setup ?