Even though I'm not an owner of the KN7000, I still play it on occasion.
I like the large pop up adjustable color display.
The keyboard folds flat, nice for travel or for storage.
The human voices, do-wop, scat, choir, etc. are unbelievable.
The organ sounds are particularly good.
The keyboard can play audio (mp3's)files when using SD Jukebox
Unlike some, I do not like the operating system. While all arrangers have a default recording save as a midi file, Technics, for whatever reason, choose an exclusive Technics file format as a default recording.
The vocal harmony...well don't buy one for this feature, it's terrible.
The music stand sets back too far.
I have also played a Tyros 2, and even though I never played a Pa800, or an E-80, I would go with any of these 3 before a used KN-7000. Reason? Where are you going to go for factory support, parts, or repairs?
A great keyboard, but scary if something happens, and it needs service, plus the ridiculous asking prices that I've seen, would make the decision easy for me.
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Larry "Hawk"
♫ 🎹🎹 ♫ SX-900