I have the KN7000 and I love the looks. I find it much easier to see things with the slant on the flip top. I had the KN6000 before.
I guess I never noticed the sunken key bed. Works for me!

I also have a Roland Va7. I find the sounds superior on the KN. I do like Roland styles, but that's a toss up on which I like better.
As to operating system, there is not a contest. The VA7 is a pain to use! I've had a lot of Roland keyboards......they used to put buttons on them. They took most of the buttons off them and called that "a user friendly feature"? I find it very annoying to have to go through several pages to do the simplest task. The KN7000 is so easy to use.
Marilyn