Get the "K" version of processor, it's overclockable one.
Might want to get another CPU Cooler if you want to overclock, to lower down temperatures. Also tell what is your budget it helps people more as people have list with budgets and best pc for them.
If this is for gaming I would go with a more powerful GPU. Also you could go with the K version of that processor and have overclocking capabilities. I would suggest at least a Radeon HD 7770. I slightly changed your build http://pcpartpicker.com/p/hTIi -added the 7770 put if you can afford a 7850 that would be even better. If this is not a gaming rig it looks like a good well balanced build but the PSU doesn't need to be 650W. 500W would be better so you could save some money.