The i5 line has continued to offer the best value for high level PC Gaming. The 6600k offers performance that shows marginal decreases in performance vs i7 offerings. Save yourself some $$$ and stick with the i5. This is now the 3rd i5 I have built (2600k, 4690k) and the 2600k even today still is capable of running systems delivering maxed settings in modern titles like GTAV & BF1. So do not fear a bottleneck or performance hit by going with a i5 instead of a i7. Make a smart consumer decision and go with the i5.