Im looking to upgrade my computer in the next few weeks. I currently have a decent rig that handles most games quite well but im looking for some extra punch. Now, to the question. I have an amd phenom II x4 840 and a gtx 560. I have the funds to buy either an intel 3570k and an intel mobo OR a gtx 660 or possibly a 660ti. Which would give me the most improvement for the money? At first glance i thought the 660 (want better graphics = upgrade gpu), but im worried about potential bottle-necking from my sub-par cpu if i upgrade my gpu. Thanks in advance for any thoughts and recommendations.