I am considering to have my budget under $1500.00 for an arranger keyboard. Any recommendations are appreciated.

My main interest is:
-Voices must be pro quality. Basic sounds must be awesome: acoustic piano, electric pianos, brass, strings, bass and sax.
-Styles: I only care the drum rythms must be excellent with nice fill-ins.
-Quick access to change above parameters.
-Vocal harmonizer: nice solid VH that can follow my right hand comping. According to some, that is not possible with current arrangers. I have to purchase a separate, expensive VH module. How about just following my voice ?

I am considering the USED as well as NEW ones. I will get more bang for the buck with the used ones.

Some current candidates that I know of that can do the things I mentioned above within the budget:
KORG PA80 (used), KORG PA60
Yamaha PSR2000
Unless I am missing something ?

I have ruled out CASIO MZ2000, Yamaha PSR740 already.