Swap the 560 for a 6870. Same price region, but better:http://www.newegg.com/Product/Product.aspx?Item=N82E16814102948
You are probably going to want and swap that case out for something else though.
You could try the Antec Three Hundred or the HAF 912. I don't own either (NZXT Gamma),
but they are both solid cases that are usually at or below the $50 mark after rebates.