Pashmee,
The PSR2000 is an ok keyboard, but if you want something that sounds really great I would suggest the same thing as Luis.
The Ketron XD9 is a fantastic keyboard, The sounds are breathtaking, and the styles are great too.
I've literally compared these two boards, Ketron on the left, Yamaha on the right.
Played the same tune with different sounds on both boards.
Conclusion:
Ketron sounds 10x better.
Also, the styles are much better and way more realistic.
So I would definitly go for the XD9.
You can listen to some demos on
http://www.mira-multimedia.de/KetronHotline/xd9demo/xd9demo.htm But I don't think the demos represent the keyboard very well.
If you really want to know how this thing sounds you must check it out for yourself.
I hope this helps
Greetz,
Marcel