The 4690k does not give you that much more, not unless you are willing to overclock. The 6500 has everything, and more, you need to run games on ultra. Remember games are GPU intensive, that CPU without a touch can run the best games in the next several years without a problem. Also DDR4 is the future. If you want to have an even better CPU performance, then you have to go for 6600k + Z170 motherboard + external cooler. This would allow for overclocking and increase the power even further.