Any one of these three are a great choice. The styles in the PA80 and the SD1 will give you much more excitement to the VA7 and the 9000Pro would give you a better interface to use but the sounds and styles won't be too much different than the VA7. I sell all three of these in my store and lately the choice of buyers has been first the SD1, next the PA80 and third the 9000pro. These are the three best sellers right now.
George Kaye
Kaye's Music Scene
Reseda, California