Yeah, they also make a FireWire Audiophile, which has a steel chassis and may be a better solution than USB anyway. As per Thasp I've looked at the TerraTec's as well, and they make a very cool looking device called the Aureon 7.1 FireWire. Either way it looks like I'd be paying for some functions that I don't need (home recording, which is what the M-Audio's seem to be designed for), but if the sound is on par with an outboard DAC then I'd be happy.

Axiom M60ti Hsu VTF-2 Mk2 NAD C320BEE NAD C542 Systemdek IIX Cables by Unity Audio