Ash,
You're going the wrong way....
I just left Naza M and Naza Lite for Pixhawk. Absolutely no regrets. You might want to hold on to that Pixhawk for a few months. I'll be giving away my DJI gear if the Pixhawk continues to fly as well as it has so far.
Caveat: Pixhawk is not a good first-time controller. 12 flight modes, simple and super simple options on some of those, 2 pages of 50 different parameters you can mess up in Mission Planner... But once you get on top of it, it sure is nice.
Good luck,
JoeBob