You could look at the Yamaha YPG-235...it is more of a piano with arranger features, but it is inexpensive, and has great sound.

A fine "bang for the buck."

http://www.yamaha.com/yamahavgn/CDA/ContentDetail/ModelSeriesDetail.html?CNTID=5014662&CTID=205200
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.