It really is worth getting the PSR 2100 instead of the PSR 2000 if your willing to pay a little more the PSR 2100. The PSR 2000 has been discontinued and Retail Stores are discounting their current stock in hopes of clearing them out. You could possibly save a 2 to 3 hundred dollars by purchasing a PSR 2000 at a discounted price over the price of the PSR 2100 and although the sounds on the PSR 2000 are "as good" as those on the PSR 2100 from what I've gathered, yet you still get more Sweet!, Live!, and Cool! Voices plus several additional other voices with the PSR 2100. Whether paying 2 to 3 hundred dollars more for 'those' extra 19 Sweet!, Live!, and Cool! Voices and other voices and a bump up increase in User Memory storage space is a decision only you can make.

Best regards,
Mike

PS: Pretty soon you won't have the option to purchase a new PSR 2000 because the current stock is depleting fast. So your only option left will be in buying the higher priced PSR 2100 VS. the PSR 2000'S discounted price. But if you have the cash I would definitely get the PSR 2100.