Boo,
I played Technics KN800, 1000, 2000 and 5000, and they did have good styles and sounds.
I switched because the other companies were offering good-quality mic inputs with vocal harmony and because Technics at that time wouldn't accept any hard drive except a proprietary one that was WAY expensive.
I did audition a KN6000. Mic input was unusable and it they had not addressed the HD problem. I haven't seen the 7000, but I understand the mic input is still no good.
They now use a memory card, so the hard drive thing isn't that big a problem.
Of course I don't have a HD on the 2100 either, but now I have a laptop and don't need it so much.
$3500. is too much.
DonM