I'm beginning to see this post as an extremely useful customer feedback for the guys at SonicCore, assuming they'll decide to have a look here at the z for future developing plans.
IMHO a new generation of PCI-e cards would be a real strike on the pro audio market.
There is a lot of stuff out there, like Presonus, M-Audio, Edirol and Digidesign itself with a strong public image. Nothing to compare about scope stuff anyway on the power and quality side. (Well, pro tools is a powerful beast indeed, but how much you have to spend for a performing system?)
I think SC lacks of a real and winning marketing policy.
More customers=more money.
More money=more possibilities to develop some new great stuff.
A poll on this topic would be useful, don't you think?