do NOT get the 9800!! AVOID AT ALL COSTS!

I recommend the HD4850. its probably the best performance thats fits in your budget. a lot better than the 9800.

and the extra memory will not make ANY DIFFERENCE AT ALL. You'd need a crazy fast GPU to take advantage of that. Years to come. Huge overkill / not worth the $

I'm not exactly how it compares to the GTX260. you might wanna go ahead and look and benchmarks for that