A friend of mine is going to be receiving a hand-me-down system in a week or two, and he's asked me for advice on what sort of video card to buy. The system has an athlon 64 3200+ and a gig of RAM, and it will need an AGP video card. I just want to make sure he doesn't spend too much money on a card that his system won't be able to fully utilize. What should he buy?