With most good computer equipment you won't experience noise through USB. Heck... if there's line noise in excess of what USB's native error connection can handle, that's bandwidth/speed being lost. That said, there are some crappy motherboards, addon cards, and chassis out there.

Interesting to see a more "utility" style device in the sys. Ever consider doing an EQ?

I'd be interested, especially if there was industry attendance, but my gear inventory is lacking (Haven't even decided on an amp to feed my HD800s yet...) I'd be coming out of the Flint area with nothing much to contribute.