Just bought the v15 update. I must say, I like it quite a bit. I do have an issue though, I wanted to try out the quick sync rendering speed of Magix's AVC codec, so I had to hook up one of my monitors to my motherboards video out. All was well, was able to render some quick sync stuff and the times were impressive... but when I tried to Preview on External Monitor, Vegas would lock up. I have an R9 390 GPU which I had been hooking up both of my monitors to. As I said, I had to hook up my secondary monitor to my Motherboards Intel GPU in order to be able to render with Quick sync. Once I restore both monitors to my R9 390 all is well again, but I can no longer render with quick sync. Never used to care, I think this was also a problem with Vegas 13, but now with QS being so fast, it would be nice to have both, as my Previews are a good deal faster with my R9. Any suggestions? Thanks.