I am going to be building a new PC. I need some advice about TV Tuner/Capture cards. Should I get a Graphics/Tuner combo (e.g., one of the ATI All-in-Wonder cards) or should I get separate graphics and tuner cards. For the moment, I don't need HDTV support, but may get an HDTV card in the future (before the FCC Broadcast Flag goes into effect). Are there any compatibility issues I'll need to worry about when it's time to upgrade to an HDTV card?