i think any card that has a decent manufacturer backing it will be fine. i dont think you get that much of a difference with different tv cards - any crappy signal, etc, would be from the nature of the tv signal, not the card itself.
i have a card from some ridiculous korean mfgr that no one has ever heard of, and it works just fine. even if the software is crappy, there is free software you can download off the net that will work just fine. besides, i think they all use the same chips (Brooktree or something?) anyways.
that said, i've had good luck with ATI cards and software. though what perry said about getting a tv only card makes sense. if you get a combination tv/video card and you want to upgrade the video card later, you'll have to pay for the tv part all over again, which is nooo good.
