I had composed a full page of hardware recommendations for you, but I don't help people who steal software.
Yeah, probably not a good idea to go around posting on the internet that you steal games since it's ILLEGAL.
FWIW, Since you already have a Sandy Bridge i3 (not a bottleneck) save your pennies for a 7850 2GB
if you need a GPU. The only reason I gave you that much advice is because you can come to the same conclusion by reading TR's review of the 650Ti.
Also, seriously consider a new 1920 x 1080 monitor.
Main: i5-3570K, ASRock Z77 Pro4-M, Asus GTX660 TOP, 500GB Crucial BX100, 2 TB Samsung EcoGreen F4, 16GB 1600MHz G.Skill @1.25V, EVGA 550-G2, Silverstone PS07B
HTPC: A8-5600K, MSI FM2-A75IA-E53, 4TB Seagate SSHD, 8GB 1866MHz G.Skill, Crosley D-25 Case Mod