New CPU, what to upgrade.

Agreed. ^
It's almost ALWAYS better and cheaper to build everything yourself. Makes no sense to buy a pre-built PC that has a weak CPU and crappy mobo, PSU, and probably bad fans/airflow, then stick a GPU in it when you can spend less money to do a quality build.
 
What's the best GPU + PSU combo for this computer? For around $250. I want games to run a smooth as possible for this computer. Links would be great!
 


Is it possible to return your PC and get a refund so you can build your own? It's super easy and very worth it. There are a lot of guides and youtube videos that you can follow to build a PC. I just built one for my brother for Christmas and he loves it. I can even help you if you want. And to answer your question. The R9-270 you can get fora bout 180 dollars and then use the remaining to buy a PSU if you feel so inclined.