well thats great! I get to save some money there haha
If what you're going to be doing is gaming most of the time, then an Ivy Bridge Core i5 CPU is the way to go. Save yourself the $100 to $200 and just buy an Ivy Bridge Core i5 CPU.
Like everyone else has said, games will benefit very little, if at all, by having a quad-core CPU, simply due to the fact that games (even current games) have not been optimized to utilize all four cores.