Hi
You should still be able to get a Ati Radeon 9500Pro within your budget. Ati
are phasing them out in favour of the 9600Pro because the 9500Pro was simply
too good and expensive to produce for the price they sold it at. The 9600 is
a similar price but slightly slower. If you want to with NVidia look for a
5600Ultra, a 5800Ultra, or even a Ti4800. The last one would be
significantly cheaper and isn't DX9, but is a good card for the money.
Hope this helps
Peter Cavan