Hi Frans,
do you actually have a PA3X??
If so, could you confirm something for me.

Does it have some XG Mapped Drum Kits??

I also had a few minutes to spend on a PA3X in one of the stores.. The idiots at the store had it hooked up to a single PA type speaker. Any chance of hearing what it should sound like was dashed.
I tried to listen to the XG drums but I couldn't really tell because I couldn't hear if the brush sounds ( 2 or 3 notes) below the bass drum ( Note 35 ) were present in kits, other than the brush Kits.
XG kits were on my wish list only insofar as it would make converting some of my old yammie styles across to korg a lot easier if I don't have to remap the drums manually to XG..