I'd suggest an i3-7300 or i5-7600k depending on what you want to spend. Optionally consider saving up for coffeelake (8600k). Ultimately the g4600 is a pretty decent and pretty recent CPU. The i3-7300 is 400mhz faster (3.6 vs 4ghz). The 7600k is a quadcore @ 3.8ghz. Those extra cores will not do much for you today, but with all the newer processors having increasing core-counts it is only a matter of time before this starts to matter more in game play than it does today.