so many of these things.
peter has to check with audio people, if he cares so much.
i personally use motu devices
http://www.motu.com/products/motuaudio/ultralite/
http://www.motu.com/products/motuaudio/828
- though im not going to go anywhere near to 'recommending' them.
they work have worked fine this year, a couple of years ago their drivers were horrible. these things are up and down all the time.