I had the VA7 on extended loan. It was a turkey, and the sound could not compare in a side by side with the Kn6000, let alone the 7000. The touch screen was so difficult to operate on live play and got so many user complaints they had to rush out another model with extra switches on the panel which also bombed. The 4000 sounds were a con because 3/4 consisted of the samples of the previous generations of products. It had some nice patterns, all of which I converted to composers.