Willum,
I wish I felt the way you do. I was really looking forward to upgrading. I went to the store twice, hoping that it would sound better the second time.
They had a KN-6500 set up right next to the 7000. I tried all of the main instruments, (piano, trumet, sax, guitars, drums), at least 50 styles, and the difference was all in the speakers. I used a good set of headphones and there was no difference. Any small difference could be tweaked on the kn6500 by using the editing features.
I would be very happy if someone could convince me otherwise. In the meantime, I'm hoping they come out with the 7500 in 6 months, just like they did after the 6000 with the 6500.
Steve