I'm looking at getting a USB audio device for my laptop (as the internal stereo soundcard is somewhat limiting).

Been having difficulty getting much research done, I've managed to determine that any device supporting the USB Audio Device standard should function fine. However, I have not been able to find many reviews of individual hardware items.

I'm not after an expensive one, but I want a decent enough one that I can be happy with. 5.1, EAX support and decent sound quality are required.

Any recommendations?