As I've been using X2a, I've started to notice something missing: the bugs! I am so pleased with X2a!
 
I use the PRV a lot, and 50+ simple instrument tracks. So far, all the bugs that have been hampering my inspiration seem to have disappeared. I'm especially pleased that I no longer need to open the properties window and click OK in order to get midi and sound to work when I first open X2. PRV editing functions seem very solid now.