DO NOT BUY the Diamond Stealth III!
I'm sure it's a good enough card, but for $60 you can buy a Diamond Viper II which is MUCH better. The Viper is based on the Savage 2000 (the next generation chip), while the Stealth III is only based on the Savage4.
The Viper II, IMO, is one of the most underrated cards ever. Now that the drivers have been ironed out, it works well with most games and it is still reasonably fast. You'll definately get your money's worth with the Viper II.
If you want to spend a few bucks more, get the Geforce 2 MX, but I would definately suggest the ViperII over the Savage4 (Stealth III), especially since they cost the same amount!