whatever you do, DONT pick up a Radeon 9800 SE. The highlight is on "SE". Unlike the 9800 non-pro and 9800 pro, which both run with 8 active pipelines, the SE does run with only 4 pipelines. The drop in performance is brutal. I repeat, do not buy this card, you won't get your money's worth. I made the mistake of buying this card, before I realized my error (and the lacking performance) and returned it.
The 9800 non-pro seems like the best card to get right now. Still a bit pricey but great performance and features (Anti-Aliasing and Anisotropic Filtering - you can activate those even for current games and still have a smooth framerate). The pro will basically get you 70-80fps in games, where the non-pro will get you 60.