If you are going to use the instrument in a home situation or as a solo, or One Man Band instrument, your best best is the PSR-S900...smooth and light keyboard action, excellent operating system, phenomenal third party support, awesome Super Articulated and Mega voices exclusive to Yamaha....AND an instrument that is light and easy to transport if you're doing any gigging.

PLUS...you get a warranty.

Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.