Hi Giovanni,
My PR903 sits alongside my KN7 and I enjoy changing stools regularly. I never have a problem adjusting to either.
If you enjoy true full piano sounds with great amplification and the bells and whistles too, I would not hesitate to buy it. I am sure you will love the experience and the different sound, its only money!!
I still only play left hand chords same as keyboards, but I also like playing written left hand when playing ad-lib (no drums).
See Ya !!!

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Ray The Saint