Wow, thanks for the quick response, guys!

@trident: Yes, in a sense, I have all I need. Only the stuff I got is semi-analogue and MIDI-less, and to synchronize two rhythms or accompaniments of two different keyboards with the pretty sensitive sliders is a pain in the butt. The only feasible way is to stop one rhythm every few bars and restart it again in sync with the other. It would be nice to control them by MIDI (and there are some MIDI add-ons, but only for a few keyboards), but the thing about having an arranger with sampling and editable patterns would be that I could sample the original sounds and program the original patterns and thus reproduce the Casio's quite faithfully. So I would have everything in one place, always in sync, and wouldn't have to lug all those little keyboards around.

@squeak_D: Thanks for the suggestions -- that's what I feared. I'd definitively need some sampling. I want that true cheesy cranky Casio sound.

One nice arranger with sampling I have stumbled upon is the Gem Genesys, and it seems to be quite affordable in used form. What do you think?

[This message has been edited by General Error (edited 06-01-2009).]