Based on the Youtube demos I've heard I'm surprised the PA1000 sounds so much inferior to a PA-3X. We discussed the strumming guitar example recently, PA1000 was very convincing. I listened to the nice new piano, maybe not as good as the PA4x, but worse than the PA3x? I loved some trumpets, trombones, even strings in some demos...
WaveROM should be as large as that of the PA3X, too, or even more.
So could it be due more to the internal speakers as well as, to a certain degree, a "manipulated perception" in connection with the cheap keybed feel?