I wonder if the pixhawk will gain "pro" status. For those that are stuck with the DJI proprietary BS, you would have to have a Woochang or A2 to use the zenmuse. I have had flawless results with the hoverfly pro. But my jobs have all been very simple flying. All LOS. If you need more functionality there are a few options but I dont know if any are the "best." My personal feeling is that less is better. No, GPS, no IOC, no RTH, no extra switches to throw you off, less to worry about=less probability of failure. KISS. But I am somewhat limited in what I can offer. Guys like Kloner flying $100k rigs dangling an Epic flying 50mph over a body of water via pure FPV are just pushing the limits. And they have crawled before they walked. So that might be the best answer of them all.