I looked at and played both the KN7000 and Tyros keyboards. Since I do not sing, I did not consider the harmonizer in my evaluation.
I decided to purchase a Tyros for the following reasons:

1. The ignorance and deceptive sales practices of the local Technics dealer.
The dealer told me the manufacturer's list price of the KN7000 was $7,000 and his discounted price was $5,000. When I told him the price was a joke, he told me he would be willing to sell it to me "under the table" for $4,000 cash. He also said that in Europe the KN7000 is selling for $14,000 US dollars. He also made many false claims about the capabilities and specifications of the keyboard. It was obvious that he was not familiar with the keyboards features or thought I was an idiot.

2. I thought the sounds were very good on both keyboards. I thought the Technics were better on some, and the Yamaha better on others.

3. I liked the Yamaha styles better.
The Yamaha had better contempory styles. Their guitar strumming and the use of drum fills gave their styles a more realistic feel to them. The Technics big band styles were very good but the Yamaha's were prety close.

4. It appears that the music finder database on the Yamaha is more flexible than the music stylist on the Technics. I was not able to change any of the default values (example tempo) on the Technics music stylist settings. Everytime I called up a selection, I had to change the tempo and other values. This makes the feature not very useful. With the Yamaha music finder database, you can modify any of the settings and save the database.

5. It appears there are more tools available on the internet to work with the Yamaha. I have found programs for editing the music finder database with a PC and other useful utilities.

Overall, I thougt the keyboards were very close. I gave an edge to the Tyros.

Even if I liked the KN7000 better, I decided that I never would buy a keyboard from such an ignorant and dishonest dealer.