I've been hearing somewhere that at least one of the Zelda CD-I games have had pretty good music. Link me to a Youtube vid plz? (pun intended)
In particular, the Zelda's Adventure overworld theme, or so I've heard.
EDIT: Wait, I found one.
Scroll down, go under "Zelda's Adventure", and click the first Overworld theme. It's MIDI. The second one is almost exactly the same as the first, but IMO the first sounds a bit better.