Just got my H8000FW (loving it), I think the a/d and d/a surpass anything so far so I will be using it as my main sound card for Cubase 4.
I have it working with 2 x aux send busses set up as externalfx in Cubase 4 over the firewire.
Now here comes the hard part, I want to use Volta (see web link below)……
http://createdigitalmusic.com/2009/01/16/analog-meet-digital-motu-volta-connects-the-mac-to-cv-synths-effects-graphically/#more-4785
….. so I need a MOTU interface, I racked my brains about this and I reckon I could go adat out from the H8000FW into MOTU sound card adat in. It should work, but then I've only had the eventide for 2 days so might be getting ahead of myself 🙂