I think you'll find the PSR 3000 a significant upgrade from the PSR 2000 DJ. And if you can get $600-700 for the PSR 2000 your ahead of the game IMO. You'll get more Polyphony more .Wav ROM although how much more .wav rom is still speculation. You'll get the Mega voices more onboard Styles plus a significant amount more of the Sweet! Live! and Cool! voices too. Although from what I've heard (through the Grapevine) the PSR 1500/3000 will have the same mushy Key action as the PSR 2000/2100 do. My 2 cents.

Best regards,
Mike
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Yamaha Genos, Mackie HR824 MKII Studio Monitors, Mackie 1202 VLZ Pro Mixer (made in USA), Cakewalk Sonar Platinum, Shure SM58 vocal mic.