Sozo,

I was much like you before buying my arranger keyboard. I wasn't sure which kind to purchase, and began investigating every one thoroughly. Here's the best advice anyone can give you . . . GO TO A MUSIC DEALER AND PLAY THEM. The two front-running boards are the Yamaha PSR9000 and the X1 (KN6000 running close behind). But I can't say this loudly enough -- TRY THEM!

Regards,
Steve