I've only had the PA4X for a couple of weeks, but I absolutely love it. Great new sound engine, everything sounds better.... Improvements have been made to OS.... It has been stable as a rock.... Love the big tilt screen... Chord Sequencer can now be saved to Songbook... even the midi to style converter works pretty well. I can't imagine an arranger that would better suit MY needs. Of course yours may differ.
If it matters, it has a reasonable weight and small footprint. You can even power a USB light from it!
I ever prefer the new guitars to those of Yamaha. Now that's saying a LOT!