I went from a PSR2000 to a PSR3000 because I use a lot of midi files. The operational improvements gained by changing from Floppy disc to Smartmedia (so no disc shuffling required), the capabilities of the USB system, and the mega voices are all very useful to me.

Strangely when I got the keyboard I didn't notice that the general voices were a huge improvement on the 2k, but now when I go backthe 2k sounds distinctly inferior.

I wouldn't upgrade from the 3k to a Tyros 1, the differences are not sufficient. However I might be persuadable to go to a Tyros 2, the keybed on the T2 is much better weighted and the Super Articulation voices sound fabulous. It's still a heck of a lot of money over the 3000, however.