Thanks Deane for your elaborate review so far. ( Janman, I think you are over asking here, really....).

First and foremost I would like to state that in my view there are no bad or poor arranger keyboards left. The totl are all excellent each in their own way, the motl arrangers (BK9, PA900 and PSR950) are almost sensational in relation to their pricetag and so are the lower motl arrangers like the PA600 and the PSR750. Hell even the KMA (= PA50=PA80) is still a very attractive package in view of its performance - price relation.
That having said I would like to repeat the view that has been expressed by virtually most overhere that the OS on the Roland BK9 is not all that friendly and that the lack of a touchscreen is almost disastrous. Reading Deane's review one can once again see how virtually all manufacturers fail ( on purpose ?) to get the balance right between the most elementary things such as the respective volumes of RH sounds, LH sounds and the volumes of the acc. tracks. Sure, all can be adjusted etc. but why would they persist in this obvious shortcoming ? And adjusting these is just the first round of tweaking after which many more rounds have to follow to make it sound the way you want it to. As such, once again, the presence of a touchscreen has almost become imperative.
Deane now owing all three brands it will be interesting to see his final appraisal after a few weeks of the sounds and styles, after all the crux of the matter. I do wish him many happy hours of tweaking, always rewarding in the end no matter which arranger that you owe and like I said , look forward to his ultimate appraisal.

regards,
John