Hello Scott,
I own Matyas Personal. I did not buy the professional version including a reverberation program because I play it with a convolution reverberation (Reaper and Reverberate LE). This organ is wonderful for symphonic music and has a huge potential. However its current versions have been recorded before the rebuilding and we can hear clearly that the instrument is out of breath. Inspired Acoustics has made a new record after the rebuilding and plans to prepare new versions. But I don’t know when it will be available, and if I knew it, I am not allowed to give this information as a beta tester of this company. But I may give you detail responses regarding to the Personal version I own.