Thanks a lot to all you guys for some really good info. I stopped at the Guitar Center on my way back from work and checked out the PSR-2100. I really liked the sounds but the over all feel was a little cheap. But thats not really important to me right now. I just saw the 2000 on ebay for $899 brand new. Is it worth for me to spend the extra $300? Remember this is my first keyboard in over 10 years.
Thank you all

There are some differences between the PSR-2000 and PSR-2100, however, they are not significant. Additionally, all of the new styles are available at www.psrtutorial.com. There are a few new voices as well, but again, there are so many great voices in the 2000 that IMO I don't believe they are worth another $300. If I were in your shoes, I would go with the 2000--the price is right.

Gary