Mark,
I would not count on it.....

Danny,

We have been in touch and your first appraisal of the PA1000 sounds quite familiar to me. My initial reactions 18 months ago were pretty much the same. Now, after a lot of programming, adding external stuff and buying the Musikant extension ( which I should have done much much sooner) I think the only criticism left for me would be the absence of the Performances, which Korg cancelled in all of the current range, and which is stupid, very stupid, but let's not go there again.
Soundwise it is better than the PA900, personally I much prefer the keybed to the PA900, amplification as you pointed out is excellent, etc.etc. AS to the styles, I agree that they have screwed up quite a few but that can easily be remedied. As to the unplugged styles, they are still there but scattered among the other style banks.And for the few which might not be there they can easily be added. Notice by the way that Korg have just released style set 36, for free download.
What is lamentable about the PA1000 and most PA keyboards is the factory default settings of the total registrations ( formerly Performance Mode)is overall crap. When I added the German extension last month I was stunned by the quality of the Songbook entries, their pads, their styles, etc. It does add kind of half a new keyboard to the existing one imho. But it also shows that Korg itself opted for the easy way out in progamming the default Songbook and sounds. Why, you only have to listen to my ( fairly basic) JS Resources for the PA1000 to already hear the (substantial) difference between crappy default programming and some more detailed and careful indepth programming imho.
Anyway I hope the next few days will bring clarity for you as to whether hang on to it , or not.

kind regards
John