Yeah, BF1942, Vietcong (is that any good Vampz?), Joint Operations, Delta Force, DF2, DF: Black Hawk Down, Ghost Recon, and any Rainbow Six are all pretty realistic shooters. Battlefield 2's coming out soon I think.
As far as a Radeon 9200 running JO, it probably can at lower resolutions (640x480 - 1024x768) with lower detail settings. It's roughly the equivalent of a GeForceFX 5200, which my friend has, though I haven't tested JO on his computer yet. I have a GeForce4 Ti 4200 128MB, and it runs JO with no problems at 1280x1024 with all detail options at their highest (except FSAA and Ansiotropic filtering, which are both turned off).