I suggest the Yamaha P80 for piano feel and the Roland XV5080 for a massive, expandable powerhouse sound engine. You can make some astounding arrangements with these two pieces. If budget is a concern - get a JV1010 instead and load it with the orchestral or vocal card.
P80 - $975 US
JV1010 - $399 US
EXP card - $ 225
Not bad huh????????