I have played pa2x.For my the keys are too heavy.I can't play those.Pa800 were not too bad.I actually like bk5 keys better than pa800.

The best keys on a keyboard that I had were yamaha 9000pro and EX5,which are the same keys.
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MIKIMIKI

TYROS 5,BEHRINGER X32PRODUCER,YAMAHA DSR112,JBL PRX618s XLF,EV ZLX12p,SENNHEISER E945,....ETC