casaet,
When you go to audition it, be sure the MASTER EQ is ON. Otherwise the sound will not be as robust. The dumb shits at Korg have it off by default. (Yes, I know why).

Also, check to see it is at V2.0 or v 2.1 of OS...then you can play with the DNC (Defined Nuance Control)sounds onboard. If it is not you can download and install it later. About 16 new DNC voices were added with 2.0.

I would plan on a whole day there..there is a lot to hear/play as it is a PRO arranger with many functions.
I would download the manual before you go, print it out and read it before you go.
There is an addendum to the manual that covers 2.x OS...be sure to look it over too.

Just some ideas.
Lee S.