Fran,
I hear that the PSR3000 is more like the Tyros then the PSR2100. It has Mega voices, a large color screen, vocal harmonizer, storage via USB storage devices, 128 note polyphony. Although is has speakers and probably more the size of the PSR2100 then the tyros, I would think that with 100MB of sampled sounds, we should expect to hear more the Tyros quality rather then PSR2100.
George Kaye
Kaye's Music Scene
Reseda, California