BEFORE YOU BUY ANYTHING: make sure you plan out your build.
Use: www.pcpartpicker.com
any i5 will do you good. Do not get the K models if you are not overclocking.
Part sellers: Amazon, Newegg, or any similar retailers available to you.
look into the AMD 390's for GPU or any respectable NVidia card such as the 970 and below for your needs.
If you need help building when the time comes I will be available
My Skype: osbotsinatra1