You would probably be able to do what you need with a good sound card. What are you trying to do, though? Usually, its the other way around. Most of the time you use the PC because you have audio stored on a HD and use it as a transport to play on your audio system. If you are going to play an actual CD or DVD, I don't see the benefit of using a computer. (Don't take my comments the wrong way. I just find your question interesting. I'm not saying you are doing anything wrong.)
If you can't get help here, try computeraudiophile.com. For technical questions, its a great resource. For issues regarding sound quality, stick with Audiogon.
If you can't get help here, try computeraudiophile.com. For technical questions, its a great resource. For issues regarding sound quality, stick with Audiogon.