Uncle Dave...
While I had many compliments on my "imporoved sound" using the PSR2K tonight (from an average audience of regular dancers), I agree with you whole heartedly. Those of us that make a living with Yamaha keyboards would gladly pay another $500 for the benefits you mention. I was really surprised at the minimal difference between the 1K and 2K... not only in price, but features, when they were introduced.
I am generally happy with the PSR 2k, but have had to adjust or eliminate some of my material or the way I play it because of limitations which I had not anticipated in this "upgraded product".
Eddie