I'm going to be using my TV as a monitor, and I have my video card. What I need to know is what kind of sound card do I need. The input on the back of my tv is the Yellow/White/Red input. I'm really trying to keep my price range to $30.00 but I'm willing to go as high as $50.00. Also, I'd like it to work well with pc games such as Guild Wars and Fable: The Lost Chapters.