Loren, don't get a sub-$100 card for your home gaming machine right now. I don't think Sub-$100 will improve things much beyond that GTS you're running now. Doom3 is coming out soon, and none of the sub-$100 cards are going to run it with all of the features, you're going to have to scale back its settings for most cards.

Even among the more expensive recent GeForce4 cards, even some of those won't run it with all its features. There's one certain GeForce4 chipset that's supposed to be able to run Doom3 well but I don't remember its name. I'm going to wait until Doom3 is about to come out before I buy a new card, so that I can let the prices drop a bit and let the card technology advance a bit. Then I'll buy whatever card Carmack recommends for running Doom3.