Can someone suggest a good graphics card?

I'm looking for a graphics card that can run mass effect, CoD 4, gears of war, and so on,

I'll spend up to $200, $250 if i really have to......

So if someone could send me some links that would be great thanks:D

Saphire Radeon HD 4850. $165 at newegg.McDomination

this card, but it can be found for a bit less