Graphics Card

Righto i just got CoD 4 WaW and atm my graphics card stink for it onlinke play is at the lowest setting and dont even get me started if smoke or shading comes into the picture. So i need help to choose a new Graphics card for not only this game but Batman as well any suggestion on a good card in the range of 200-350$

What card do you currently have? Do you know what cards your motherboard would support?
You can get really good graphics cards for relatively cheap prices (less than the 200-350 you are after).Like the 9800GT
http://www.newegg.com/Product/ProductList.aspx?Submit=ENE&DEPA=0&Order=BESTMATCH&Description=9800GT&x=0&y=0