I think Ketron came up with the best solution for drums. Sample real players and real drums and sync to the rest of the style.
It was easy to do because drums do not have to follow chord progressions...

I am a little biased with this remark, since I am a former demo guy and did a dvd for Ketron, but it is one of the reasons I have always enjoyed my SD1 & SD1plus.

"Live Drums"...