Imho,the best bang for the buck right now regarding a video card would be this one: http://www.ati.com/products/radeon96...600/index.html
Have a thorough read on what it can do. It can be had here in the States for around usd$135.00,but of course this will be different where you shop.

I've used the AIWonder ATI cards for several years now and have been happy with their performance. Be sure to get the latest Catalyst drivers,but stay back to about the 9.03 MMC(Multi Media Center) drivers. The latest ones may cause a bit of trouble...