We can guarantee you that i5 will do everything you need if you are only gaming. Guaranteed.
CPU: Changed to i5-4670K, again, it's all gamer needs.
CPU cooler: Upgraded to Hyper 212 Evo, perform better and cost less.
Motherboard: Changed to ASUS Z87-A, one of the best affordable Z87 board out there.
RAM: Changed to G.Skill Ares 8GB, gamer do not utilize more than 8 GB.
SSD: Upgraded to Samsung 840 EVO 120 GB, best SSD on market, no joke.
GPU: Upgraded to GTX 780, beast of a card, uses less power and produces less heat. Therefore, higher boost clock due to GPUBoost 2.0.
Case: Changed to Corsair 300R, sleek, windowed, sexy case.
PSU: Changed to EVGA SuperNOVA NEX750B, very high quality PSU, and honestly 80+ Bronze efficiency is a lot...