Hello,

I am not a musician at all and I would like to give to my boyfriend a digital piano.
I have the choice betwen:

-Kurzweil SP76
-Kurweil SP88 both stage pianos
-Yamaha PF 85

what are their respective qualities and which one would you pick? What is the difference between a stage piano and a portable keyboard? They make the difference if you go in the yamaha website.

Thanks