I think if you want concealment, security and easier than threading your belt on and off a fixed loop system, the QMS is the only way to fly. They are not paddle easy to put on and take off, but it shouldn't be if you want it to stay on your belt during anything more than a range session. There is never a free lunch.
Re the Ulticlips, haven't messed with the XL but wouldn't trust it for anything more than a range holster.