Check out the
Tarot ZYX-M and the Pixhawk. The Tarot has been said to fly better than a DJI Wookong and close to a DJI A2, both of which are $1000+. The Tarot is limited though in that it does not have waypoints, follow me etc, but it is a great plug and go GPS FC. The Pixhawk and its clones will require more work to get high level GPS flight performance, but when tuned they appear to be as good as the Tarot and other expensive FCs. The Pixhawk also uses open source code and has more features than you can handle such as follow me, way points, circle, etc. It will take more time to get flying, but you won't get bored with the features it has. Some notable pixhawk clones are the Pixhack, PixFalcon, RTFHawk, and many more. Hope this helps.