I have recently installed Sonar 5 and NI's B4 II on my flr2006 software arranger system. It will be hard to exceed the quality of the B4.....although on my system I have a bug...oh, oh, oh... On some presets my system goes into overdrive (as per my audio mixer)....but I hear no sound. Could be something to do with bats....utilizing frequencies outside of my hearing range. This will need a fix. The workaround is not to use these presets....not a big issue.