That time of the year, new computer thread go!

Intel Core i7-3770K Ivy Bridge 3.5GHz $319
This is the 6 core version of the i5(4core) it's Ivy bridge, so same as the i5, just bigger. One thing to note games dont use more then 2 cores usually so it would only be a small upgrade. IMHO probobly not worth the extra 100, but thats up to you.