Card for widescreen gaming

[hi tech hate]

So in the next week or two I play on building a budget Conroe system and I have no clue what to get for a video card. My budget would be about $200 for the video card and it will have to pump out 1440x900 for gaming. What do you guys suggest?

edit: card doesn't have to be brand new, I'm willing to search for a used card to save some cash.

 

[Einhanderkiller]

7900GS.

 

[Marvelous]

1900GT or 1800xt... Just love ATI's texture quality... Top notch..