Speaking of Earthbound, I love the music in Mother 3, the GBA sequel that never made it outside of Japan.
http://www.youtube.com/watch?v=RhKyPKcm8Po - beautiful harp, and the MIDI saxophone is soAMAZING.
http://www.youtube.com/watch?v=lx-N9GG6PYc - fantastic battle music, with Game Boy arpeggios.
http://www.youtube.com/watch?v=a7sf5fVui9w - The theme/a medley.
It's the kind of music you don't hear in JRPGs much. Totally weird and enchanting mix of synths, MIDI instruments and odd time signatures.
It's a shame it never got a western release, as it's the best traditional RPG I've everplayed, and the strangest. There's an excellent fan translation out there, so get it!