Hi There
I have just checked out the features of the Korg in more detail, and a hard disk is available for it, (If not already fitted) also lyrics can be displayed on the screen and with the video interface option, displayed on a separate screen, and before I forget, it will also play Wav and Mp3 files, so have a word with your local dealer.
By the way Midi and Kar files are that small that even a small hard drive will hold thousands of them.
Hope this helps.

Bill