I own or have flown the majority of flight controllers currently available. The best for overall stability I would say are Wookong-M, Mikrokopter, APM 2.5, and YS-X6 though not necessarily in that order. MK used to be the gold standard and is still the system of choice for a lot of pros, the Wookong has displaced a lot of MK with pilots that just want to fly with a minimum of interaction with the electronic bits. Bottom line is none of them are going to give you perfect stability in windy conditions, living 10 miles inland from the Atlantic ocean I deal with varying degrees of wind constantly, it's a rare day here when there is no wind at all.
That said, I've found the best solution to getting video that needs a minimum of post processing is not so much which flight controller I'm using, but more a case of what the camera is sitting on. I've tried so many different gimbals I'd have to stop and think for a bit to put a number to them, I've also tried a number of different ways to stabilize them. Recently I acquired two brushless gimbals, one a GoPro size and the other large enough to carry a Nex 5n under my Cinestar 6, I have to say there is no other single thing I have done or tried that has made as big a difference in the quality of the video recorded in flight. While not absolute perfection they are far closer than anything I have ever done with a standard servo driven gimbal, if you want perfection you're looking at spending well into the 5 figure range for just the gimbal but the good news is the technology exists and the price is reasonable for hobby level systems that work nearly as well as what the big boys ave access to.
My take on the whole thing now is this, the flight controller doesn't matter all that much any more, use what you're comfortable with and works best for you. The biggest piece of the puzzle is use a gimbal that has standalone stabilization and has been proven to work without hours and hours of tweaking and tuning, and right now that means the new wave of brushless gimbals that are just starting to hit the market. The first time out in the field with the Cinestar and brushless gimbal I was able to get a lot of useable video in wind that was gusting to over 20 mph, previously with the Photohigher AV130 and Skyline RSGS I wouldn't even have considered taking the Cinestar off the bench in those conditions knowing full well 99% of the video would be unusable and even the little bit that was would require a LOT of post process tweaking to be acceptable.
Ken