If you have a soundcard with a coax output and a setting to allow you to set it for digital out, all you need to do is to connect your puter to your home unit.
I'm using some cheap coax with rca ends on it, that's about 40-50 feet long. The bad? You do have to route it if your puter and home stereo are very far away from each other.
The good? This cost me the price of a couple of Canare rca ends. 6 bucks...The cable? It was some left over I pulled out of the attic from an old wireless tv install.
I'm going to change out the coax to something with more shielding sometime or even try my hand at a diy optical cable. But for now, nothing beats your own radio station that plays your favorite songs without any commericals.
Make your own MP3's for better quality or even better since hard drives are getting huge, flac files.