Hi Katrina,

If you can find one, I believe that a KN1600 has better compatibility with the KN6500. No doubt someone will correct me if I'm wrong but I think files saved to floppy can be interchanged either way between both keyboards. I will endeavour to confirm this as one of our Technics Group members here in Melbourne, Australia has both the KN1600 and the KN6500 and prefers to use the lighter KN1600 when away from home. The KN2400 uses floppies rather than an SD card, but again they are only compatible one way. Files created on the KN6500 will load into the KN2400 but not the other way round.

Len