I'm looking for ability to get additional MIDI song files to play on the Casio, that will be able to utilize the light up key lessons. I have the LK 240 and see that it can connect to a computer.... but can it also do this connecting to an iPad? If so, any suggestions where to get the MIDI files from? Alternatively, I saw the LK 280 allows you to simply copy the MIDI file to a SD card & pop into the Casio, but since the 240 doesn't have the SD card, I'm hoping there's a simple alternative with iPad (logistically don't want to actually connect a computer). We're pretty casual players, so this seemed to me to be the only key feature that might entice me to upgrade to the 280..... are there other key reasons? Thanks.