OK, so after so much agonizing over which tracks to select, I still don't have a definitive list and many of them are starting to sound very much the same to me. Something about the sound library tells me they sound capabilities were criminally underused. Also, there aren't so many memorable melodies. Hell, compared to what was done with the basic NES sound chip, the lack of attention spent to the PC Engine's capabilities is downright criminal.
Also, I still need a heads up about the details of HES m3u formatting.