Hi Miden.
I used to have pa800,and Bk5.Now I have pa600.To me BK5 had the best keybed.Pa600 is not as bad as pa500,but to me bk5 was a little bit better.Better then S910.
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MIKIMIKI

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