Looking for upgrades for around $300

Hey guys, i need a new GPU that is better than a r7 260x that will not bottleneck by a I3-4130. If you can perhaps include another CPU if you want like a higher I3 or a lower I5. Thanks!
 


Cards in the message. It's a 260X and I need an upgraded. It's 300 dollars for a GPU+CPU combo or just GPU that wont bottleneck or slightly bottleneck with a I3-4130.
 


Forgot to mention i'm radeon and my PC has radeon drivers in it.