My dad got me a HD 5750 for new years.That card is one of the best, but lags a little when playing loving Just Cause 2.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814102878Great card, a tiny bit out of 100, it's 109.99, and it's the best card you can get for your money. You'll be able to run Crysis on this, granted that you have a decent processor and RAM.
great, i'll wait for it to come in stock
but, how many watts do you need to run it? i have like 300watts i think also, i have a dell inspiron 560. it's got an intel dual core processor and 6gb of ram