Best external USB soundcard for Macbook

[KiNETiK]

Hey guys,
I'm looking for a good 5.1 usb soundcard to turn my Macbook into a media centre. The Macbook will be connected to an AV amp for sound and projector for visuals..
Can anyone recommend a good soundcard to go with?
Thanks

 

[DeeJay-Mo]

Not the best, but not bad either:

But if you're amp has optical in, then you could use the macbook's audio output and do away with an external soundcard altogether.