Videocard for Doom 3

I don't know if anybody's going to know this off the top of their head, but I figured it couldn't hurt to try. I bought Doom 3 a couple days ago, and I've been running it on medium resolution (there are 4 options: low, medium, high, ultra), and my fps usually fluctuates between 20 and 30 when i have all the lighting and textures turned on. My graphics card is a nVidia GeForce 5200 series. I can check the details on it later but I'm not at my house right now. My question for you guys (and girls? are there girls here?) is this: what videocards on the market today can power a game like doom 3 (or half life 2 when it comes out) at its highest picture quality. When I run doom 3 on ultra I cant play it, the fps are in single digits and it jumps like crazy, and its only a little better when on high. Would I have to spend upwards of $400 to get a card that could run this game at a solid 40 or 50 fps when on the highest resolution?

My computer should be fast enough to handle it (2.4 GHz, 512 RAM), I think its just a matter of the videocard.

Thanks in advance for any help.

 

Or just the 9800pro also should be just fine enough . Since well I only run games at 1024x768 but yea thats' just my nickel in the bucket as well I kinda always say.

 

Doom 3 is OpenGL-based, so nVidia's 6800 GT or Ultra is the best right now. Far Cry runs under D3D, so ATI's X800 is better. Half-life 2 has conflicting reports. The beta testers supposedly all preferred ATI, but the beta benchmarks seem to point to nVidia.

See this article on AT for a nice roundup of Doom 3 performance.