I know it's getting old, but I think you would love the Ketron SD1.
To answer your question, the 3000 is quite an improvement over the 2100 and even greater over the 2000. Individual intro-ending buttons are a big thing.
Just the storage capability is almost worth it.
You DO lose a couple of things, such as the dedicated harmony button.
Tyros is WAY ahead of any of them though, except the SD1.
DonM