"Not shure I get the ADAT solution - is that not still the same driver? - so two applications(clients) would still compete the same single-client ASIO driver ?"
Dietz' solution is almost the same (and he is the man who knows everything about MIR ;))
buy a cheap usb card with digital out and good asio driver and set this as output on MIR. or maybe your mainboard has digital out (herefore easily use asio4all driver!)
now in cubase you can use a digital input of MR816 (as audio input or virtual instrument). the only thing now missing is a digital cable between the devices ;)
btw: hi again! i would love to see your monster computer specs :)