Bachus,
For some reason, according to posts on some forums, even Ketron's Audya series has had stability issues. I have never owned an Audya but here is my experience with the SD7. So far, I have not found stability issues with the on board sounds or styles. I have converted over 6000 styles from Ketron legacy modules and keyboards and have auditioned about half of them so far. Many of these "legacy" styles were converted using software and were from Yamaha, Korg, and Roland keyboards. Using these styles I have found some that will hang up the SD7. However, If I use only the styles from Ketron products such as the Midjay I have not had any stability issues. Perhaps this is the same issue the posters talk about on the other forums. It is much like when someone posts they can't get a certain feature to work on a new keyboard you never know how they were trying to use that feature.

Deane