I'm sure, if you take the time to customize the programs - you can do just fine in a live situation. The Yamaha really shines in this application with NO setup time, and that's why so many of us are having such good luck with it so far. It's far from perfect, but it really has the best combination of "gotta-have" features in the best layout.
If the Korg had just a few more improvements, I'd give it another close look, but it's still missing a few key elements of ease for me.
For one - I'd really miss the 4 fill ins, and fast mixer levels. I don't like the default window on the Korg for minute changes in volume to the main parts. You cannot make incremental changes unless you are in the mixer window, and that takes 2 more (button)pushes to get to where you need to be. If sequencing becomes a bigger issue for me - I think I may even be a PA60 candidate - I don't like the Korg harmonizer, and that seems to be the biggest feature missing. I'd use the stereo inputs to feed the signal from my Voice Prism, and have a better all around sound than I have now. I just want to wait a bit to see if anything else pops up. I'd hate to settle again. The mic input in the 2000 is really good, and it's spoiling me. I rarely need the rack bag at all.
(Oh dear ...... I'm getting complacent !)