Artaher ,

I don't think you will find any surprises . The XD9 is a very good value .

Ketron basically allows for add on's such as hard drive , vocal kit , pattern expansion and video interface .

A basic XD9 w vocal kit would be equal to the PSR2000 , but just a little bit more money than a PSR2000 ( in USA) .

XD9 is a very nice keyboard with great sounds ! Have fun .

dano