I currently have a Disklavier GranTouch with a DKC500R that plays floppy disks. It's been a great piano, but I wondering if it's worth upgrading the component section to the DCD1? They claim that this can then make it as good as a Mark III. Is it that much better? Would it effect the quality of the piano in general or only when I play things back with a CD? Is it worth the $1300?

Many thanks!