Seems to me that by the time you add the expensive hard drive, and buy an external harmonizer, you will have spent about 50 percent more than you would for a PSR9000. And you still wouldn't have sampler, video out, SCSI connection, and all those wonderful vocal processors, such as Noise Gate, Compressor/limiter, parametric e.q., etc.
Also, I don't like the fact that Technics took something like 6 months to first acknowledge and then address the almost-fatal "bugs" regarding chord recognition.
I owned KN800, Kn1000, Kn2000, KN5000 keyboards, but they have lost me because of the above issues.
Just my opinion. Hope everybody has a GREAT 2001.
DonM