For $1500 or so MORE than a PA2Xpro, the Ketron's drums OUGHT to be much better than anything else out there.

And indeed, I think they are... but with a simple caveat. Most of you have heard only the 'Live Drums' demos. Recordings of real drummers playing real grooves (and apparently, putting real pickups in real Variations, which I'm not a fan of

) and fills and Intros and endings. They taped a drummer playing, essentially... It SHOULD sound great!
BUT.... forget ever using the drum playing as a source for your own edits.

Forget being able to move a snare drum hit or a kick pattern around slightly to better suit another tune. Forget about being able to change the kit to a more or less aggressive sounding one with a simple PC#. Forget about turning up the toms in the fills (or down!), or tuning them to better suit the key of the song. Forget about using your own Intros and Endings, maybe copied from a MIDI file. And forget about extracting the hi-hat pattern to import to another style to give it a lift...
Oh, and forget about user created or third party styles using drummer loops (unless you are Turkish!

). Not exactly a huge selection available, out there...
You gain a lot with audio lops. But you lose a lot too. For me, at least, editability and flexibility trumps set in stone 'perfection'...