I have both the PX5S and the MOXF8 and I find the keyboard on both instruments to be good. I would rate the PX5S keybed as a little better, but I am perfectly happy with MOXF8. Plus you get so much for your money with the MOXF. Compared to all the old spinets that I have played in my life, most all high end keyboards do well in the keybed area. Just my opinion.