I use an old Steinberg VSL2020 card in a setup similar to yours. It's about 5 years old, and was fairly expensive when I got it, and is discontinued. You can probably find a used one pretty cheap
heres the zzsounds page.
The MOTU PCI interfaces have three propriatary I/O ports on the card itself... It's the rack mounted interface that that has the ADAT I/O... so if I understand the question... the answer is noAnd how about the MOTU interfaces? Do I really need to have the full version, or can I just buy the expansion and plug it into something?