The CPU is great and the amount of RAM is perfect.
Maybe you could upgrade your GPU. Depending on your budget, I would recommend getting a GTX 770 or a GTX 780. If you change your card, you may also look for a more powerful PSU. The choice of the brand is personal but ASUS, Gigabyte and EVGA are among the best one.
For the PSU, anything from Seasonic or XFX will perform great. They are widely trusted brands in power supplies.
I probably will upgrade my GPU as you said and get a new PSU. Thanks.