Z-SYS 8.8 also Focusrite VRM

Waiting on a Z-SYS 8.8 with coax SPDIF to turn up. Anyone ever used one, any tips for smooth sailing initially?. Also, I have the Focurite VRM now. I did try it along with my Mackie 1640i Onyx on ASIO-4ALL drivers. It wasn't happy. Can I rely on that better off a SPDIF from the coming Z-SYS you think?.  Oh, and, that'll be connected with the MOTU Traveller Mk3, not the Mackie Naturally.
 
Cheers,
 
Tony