After spending a good amount of time with the Kn7000 and the Tyros and the PSR2100, I came to my conclusion.

If you are looking for a fantastic instrument --- great sounds, fantastic sequencer, -- just an over all good quality sound, it's the KN7000.

Now Yamaha approaches keyboard playing from a different direction. If you are looking for
1-Ease of handling Midi files.
2-A good vocalizer.
3-A goos music finder.
4-a good EQ for your vocals.
5-A good EQ for the keyboard.
6-Good drums and basses for dancers.
Then it's Yamaha.

My KN700 set up'
1-Mic wire into external vocalizer.
2-Wire from vocalizer to mixer.
3-Midi wire from keyboard to Volcalizer.
4-Keyboard wire to mixer.
5-mixer wires to powerd speakers.

The Yamaha set up;
1-Mic wire to keyboard.
2-keyboard wire into powerd speakers.

So one has the best sounds and construction and sequencer, and the other less outside equipment, less wires = less possible conecting problems, less to carry, is an all-in-one unit, and has a great bottm (drums and basses)for dancers.

I do manage with my KN7000, I love it -- but there is so much more involved before I can do a performance. When I am at home I have no desire to play the Yamaha. I am considering a Yamaha PSR3000 for my smaller jobs, and my Sr. jobs.

After deciding how you want to use the instrument, the decision is not a hard one.

Hope this helps, John C.

PS, I know I have left many features of both keyboards, I just wanted give an overview.