This is a great writeup! Thanks for giving us students of the DA/SA system something encouraging. I personally have come to really like the DA/SA system. I recently shot my first PPC match with my 92G Elite and I was frankly amazed at how well I did. I was the only guy there with a TDA auto and the only guys with SFAs that beat me were the ones who were better shots than I was.
My experience trying to master the Beretta (and to a lesser extent the Sig) has always been that the DA pull can be every bit as accurate as the follow up SA pulls. During weapons qualification with M9s one of the things that would always get me in the face of the so called "instructor" was when he told my soldiers to "throw away" that first shot. And with that, trying to get the folks to follow Army standards during qualification and fire that first shot DA was near impossible. Oddly many of the same officers and NCOs who advocated such buffoonery would have an aneurism if I suggested the first few pushups on the PT test could be done on you knees. Oh well, that is a horse that I have beaten to death far too many times.
In my opinion, in the operation world of LE/Mil/SD, good training is far more important that the latest and greatest gun and fire control system. Sadly, the first 2 and to a large extend the 3rd is driven by folks that want the best results for the least amount of time and that will always cause them to search for the better mouse trap when learning how to hunt mice is the first thing they need to focus on. In the world of competition, where guys are all at the top of their game and winners are determined by the slightest nuances in performance, then there may truly be a better gun. That said, yours, Langton's, and Ben Stoger's performance would indicate that even that issue isn't settled.