The more I play the PA1Xpro the better I like it!
From a "Physical" point of view, it is well built and really "Looks" Pro! IMO it has great eye appeal.
Sound wise, Top Shelf!!!
I have not played a KB that was soooo expressive, it takes some getting use to.
As far as the touch screen ... If your finger tip lacks heat and moisture, you will have a problem. Also, if the screen is cold (the KB is left in a unheated area) you will have a problem.
For my money the Vocalizer and the effects that go with it are the best I have heard ( I have never used the Yamaha, only SD1, PA80 and Digitech).
I do not want to do comparisons here on the forum. If anyone is serious about getting this KB and is interested in anything I have to say you can email me your phone # and I would be happy to call you (USA and Canada ... I'm not that well off!!)