AMEN, brother! I am in HEAVEN with mine too. It's built solid - feels great - sounds amazing and the flexibility and editing are off the charts.
I always liked the simplicity of the Yamaha OS, but I am used to the way Korg organizes things, and it's easy for me to get around. I am making final tweaks this week, and next week - it goes on the job!
BTW - Staples sells a 16GB USB drive that only sticks out about 1/8" from the slot - you can leave it in and it won't get bumped.
$34 - but worth it for the convenience.
The audio inputs also surprised me with plenty of gain for my iPad/pod for breaks and DJ stuff. The choices are so cool:
live / arranger / MP3-SMF(x2) / and my outboard playlists - all available at once!