Overall, unless you are willing to pay $1500+ more than the BK-9, it seems the harmonizer is a moot issue. If I need one for the BK-9, I can buy a FAR superior external VH for FAR less than that! So far, from UD's demos, it seems the built in VH has some serious issues, and you may need an external VH even though you paid for the internal one!

And, for solo or duo work, the touch screen is also a non-issue. Who on earth doesn't set everything up in advance for stuff like that? My primary beef with having no touch screen is that I do a lot of live band pickup work, and seldom have an opportunity to set up Performances in advance, so calling everything on the fly is important. But it looks like the BK-9 Performance editor iPad app may allow me to do even that soon, and make the need for a touch screen even less.

Also, TBH, the only real need for a sampler is if some of the internal voices suck so bad you need to put something better in! Haven't so far come across anything I can't live with... And I'm VERY picky!

I agree that everything is subjective as to sound, but I think that the areas you think the PA900 has an edge aren't quite as big as you think.