If you are looking to sequence songs, then the KN7000 is a far better keyboard. I also think the 7000 has the best Organ sounds of any keyboard that I have heard.
However, if you are into singing, forget about a Technics Keyboard. The built in harmonizer is well, let's just say 'weak".
Yamaha PSR's have amazing built in harmonizers that even make me sound decent.
Keep in mind, when you Quick Record on a Yamaha, the saved song is a midi file that can be played on almost all keyboards. If you want to make a similar midi file on the KN7000, you need to be prepared to do a lot of work. However if you Easy Record on the KN7000, it automatically saves it as a Technics File, and these files will only play on a 7000, or the 2600, or 2400.
Even though I don't own a PSR3000, I have played one, and own a PSR740. Dollar for Dollar, or Euro for Euro, the PSR3000 would be, in my opinion the better buy. If money is not a problem, I would pick the KN7000, that is, if you could find one.
Yamaha is going nowhere, and will be there for support and repairs, while who knows how long Technics will be there for similar services.
What would I prefer? How about a KN2600 and a PSR3000. This way, you have a nice compromise, and you may even have both for the price of one KN7000.
Just my 2 cent opinion.
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Larry "Hawk"
♫ 🎹🎹 ♫ SX-900