USB DA recommendation needed

I have an apple G4 cube that i want to use as jukebox for my stereo. I am looking for an external soundcard that gives me good sound. I am getting a Linn Majik, which has only analogue inputs, so the soundcard should have rca jacks.

I tried the m-audio firewire audiophile, but it crashes the cube all the time, even though it sounds great. I also tries an imic and it sounds horrible, but works flawlessly.... so maybe usb is the way to go.

What other options are out there? not needing drivers is a plus.

thanks!

O.