And we are all happy for you my friend. I can only concur with all that has been said here in response to my posting. Very few people here on the site would have to start from scratch and like you said it is an itching that has to be met very often.
I for starters will not exchange my PA800 for the PA900 ,but then I have the luxury of the additional PSR750 and the recently acquired G70 of which I still am not sure whether to keep or not. The remark about the Ketron SD module is a valid one all the more so as its follow-up, the Ketron SD1000 module is hitting the streets as we speak. ( 450 euros in Europe).
However bearing in mind the streetprices of the three totl arrangers (including the audya) I would venture to say that the following combinations are among the winners. If you consider buying a totl keyboard you might get the PA900 + PSR950 for approx. the same amount of money. If you have to stick to a tight budget I think PA600+PSR750 (at half the price of the first combination) is an absolute winner. Just my pick. And as mentioned most folks do not explore to the full the potential of their keyboards. I have now had the Roland G70 for 10 days and have been in touch with several G70 gurus,but although they do know a lot more about it than I do I have not come across any software so far that is very worthwile a reason for me to foster doubt as to whether to hang on to it. Mind you I am not talking styles. Styles galore for the Rolands as for any other brand. No, I would like as yet to receive a set of registrations ( user programs in Roland language) that could set my heart on fire. Similar to the way I programmed registrations ( performances in Korg language) for the PA arranger keyboards. Seems like most Roland players do not get beyond the surface of minor tweakings of volumes and a bit of reverbs here and there. Is there no one out there who could offer me an impressive set of registrations ?
Sorry I am drifting off topic there, my own topic of all things !!!

regards
John