I bought a Kurzweil K2661 and judge it to be better sounding than the other many keyboards I have, with one caveat. It's sounds are more orchestral OOTB. The board is infinitely editable and you can add as many layers as you want.
The new light version is a great deal, but I have never played it.
http://www.kurzweil.com/Product.php?id=198
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pa4X 76 ,SX900, Audya 76,Yamaha S970 , vArranger, Hammond SK1, Ketron SD40, Centerpoint Space Station, Bose compact