I've played a friend's PA3x quite a lot. There is much that I love about it, but much that I don't. If I were doing more ethnic musics, where the built in sounds didn't cover my needs, I'd probably be on one today.

But my primary problem with Korg's is the much smaller style selection. Compared to Roland or Yamaha, their library is far smaller. I could probably make most of the rest of the keyboard work for me (mind you, paying more than $1000 more than the BK-9 would rankle!), but I would miss the huge style selection I have now...

Don't get me wrong, I'm not down on Korg in general. I still have a Triton, and love the Kronos (out of my price range, though!) but simply find for how I use them, Roland arrangers are easier to use and I like the sound... The drums are still hard to beat by anything short of a drum loop or sampled kit, and the new audio loop feature improves even that..!