One note about the PCI card Firewire outputs - they might not be firewire spec in terms of data transfer, but only in functional form. This is the way that RME cards work between either PCI or other interface cards of theirs. The Firewire cable and interconnects are only using the form factor, not in terms of the actual data transfers. I think that's how the MOTU PCI card works, but I'm not entirely sure.