Henni I dont think that the SD9 is the new Audya but it is definitely an upgrade the Audya is great but if we compare to korg pa4 or the new SD9 the audya is left behind them by far... I realy think that Ketron will release a new Audya maybe next year but for me the SD9 is definitely an upgrade and relatively cheap
but after all I don't think i will buy the SD9 now i will wait because I don't trust Ketron they promise a lot but in the end you get unfinished product the Audya from 2009 and stil unfinished...
take my advice dont be reckless be patient