Yamaha is providing these new Sound/Style Packs, offering 64MB of sample space. As I mentioned here I already mailed to Yamaha with the question/suggestion to bring out new Packs with sole emphasis on one instrument, for example one or two blinding Sax samples, a few sounds and a few styles thrown in for good measure.
In the same vein they might offer a package with a couple of new drum sets based on other (better?) drum samples. As far as I know an acoustic piano sample needs a lot of sample space but a drum set does not. In the Korg PA800 I can easily load their previous sets from the former PA models within the space of 64Mb. Mind you,I am technically no judge of affairs here but on analogy of the Korg experience I do not see why, other than reluctance, Yamaha would not be able to release a package with drumsounds and samples that would come close to K and K.

regards,
John