rgtaa,
I played the PSR-9000 several times and I don't need to play the 9000 Pro to know how the action is.. I use to own a Yamaha EX-7 and that keyboards keybed was the 61 key version of the 76 that's used for the 9000 Pro.. My 550 cost more than $300.00, and just because I have the 550 doesn't mean I don't know the difference between the feel of the 9k and 9 Pro.
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GEAR: Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller). SOFTWARE: Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.