There are 'big band' rhythms on the wk-3000/3500's. That is the 76 note Casio keyboard. This keyboard also has the ability to add new rhythms (from internet downloads, or ones you make yourself). We (users) have hundreds of styles that we are sharing. The Casio CKT 691 is the shorter note keyboard...using the same tones as the larger wk3000/3500's. You could also 'cheat' a little...and play along with the many 'midi' files of the great old tunes that are avalible on the internet, and can be played using the Casio.
Here is 'our' web link, if you want to learn more about these keyboards.
I haven't seen the other keyboard you ask about.
Merry Christmas, Jim http://www.originalz.com/casio/casio_bbs/

[This message has been edited by Jim Wintringham (edited 12-16-2004).]

[This message has been edited by Jim Wintringham (edited 12-16-2004).]