When I first got my yamaha psr9000 ... I downloaded 1,000's of styles from yahoo styles forum for free... and loaded them into the hard-drive... Swing,Country,ect... and imported from other Brands korg,technics so they would play on psr keyboards.
So check the arranger out for easy of use, keyboard feel,vocalizer,sounds,ect... the styles you can import ... it makes it like a new keyboard ...
I imported the psr2000 and cvp209 and technics styles into keyboard ... I can stay current with whatever new styles comes out!
I agree with DONM, best thing is to sit down with these Babies and see which one TURNS YOU ON!