Everything looks good, you might want to get a higher end 500-ish watt power supply, as that power supply will hardly use 500W.
If you wanted pure gaming, go with an i3 2120, and a better graphics card, like a 7870. The money saved from going back to the i3 will allow you that upgrade. The i3 won't bottleneck the graphics card, and games are more reliant on graphics cards than the actual processor, so I'd recommend you put more of your money towards a nicer graphics card.