Good review man! I may be way off here, but from the reviews I've read so far regarding the Korg vs Yammie, it seems to me that Korg geared the PA1X-Pro towards synth junkies. Those who love synths, and also love arrangers, but want that good quality arranger with full synth features and the flexibility of an arranger (that would kick ass in a studio environment). Again just my opinion.
GEAR: Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller). SOFTWARE: Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.