I keep hearing and reading good things about that keybed feel and recently found out that the Casio PX 350 uses the same keybed as the PX-5, but is $200 cheaper and has just been reduced by another $100, so have ordered that from Sweetwater to try at home.
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Graham, Korg Pa1000, Korg G1 Air, Countryman E6, Roland BA330, 2 x Roland CM-30, , Mackie SRM150