380 over 280x. But to throw a wrench in your plan, and help you get even better, get a GTX960 for gaming. Its better than the 380 for gaming, uses less power and runs cooler. You can get it in a 2GB or 4GB version just like the 380, and the drivers are more stable. Honestly its a no brainer, for me anyway, or if you're not married to AMD for some reason.