Doing it a bit different....
I am using the M-Audio Audiophile USB-based outboard DAC to pipe both internet-based audio streams, most notably KPLU in Seattle (jazz). This also allows me to use the CD player in the PC as my transport, which pipes its signal entirely in the digital domain out to the M-Audio.
Originally purchased to transfer old LPs into MP3 files but I haven't bother with this part mainly because I'm quite happy with the stuff I'm getting off the internet these days.
This is *excellent* sounding and I highly recommend it. You'll find the M-Audio Audiophile devices for less than $200 on eBay and at your local musical instrument store. There are lots of providers of this sort of outboard USB DACs, BTW.
Cheers,
David