[dillon99999]

IMHO:
firewire has too many issues.

when i had 1814 it would make weird noises when i moved the edit window during playback (would have
to quit and restart pro tools). not a pleasant experience when a customer is sitting next to you!

pci is more stable - none of those issues stated above.

here is something to think about:

why is it that Digi doesn't make a FIREWIRE HD1 / HD2 / HD3 system???

probably because they know that Firewire isn't something a professional studio would consider.

perhaps they are working on such a solution, but for now, HD1 is PCI / PCI/e

firewire is good for people on laptops, because they don't usually have a PCI slot.

usb is even less reliable than firewire.

ymmv - take it for what it's worth - been there, done that.