Since you are familiar with the E-500, you may be interested in trying out the E-600. I just demo'd one today. It has a touch screen interface, about 500 sounds, excellent styles, and though it just has a floppy drive, Roland has made access of the drive almost instantaneous, so that you can call up a new style (or performance set) very quickly even as you are playing. Quite a few nice features. In this area, the list price is about $4000, though I suspect that I could buy it for closer to $3000. I have an E-96, which has a similar layout to the G800, G1000 and E2000 keyboards. It is a fine keyboard (about 270 voices, but an earlier sound module than your E-500), but the interface is really somewhat complicated. The E-600 is much more intuitive. All depends on what you want.