Two releases that were never mentioned:
Ys Zanmai
Cotton OST

Granted Ys Zanmai is a festival release.  Hopefully it'll become more widely available later.  I know nothing about the music of Cotton (four discs of it), just that the game was one of those I remember mentioned in the old days of EGM and Gamefan as one of those quirky Japanese titles that never come to the U.S (though according to Wikipedia the Turbografx-16 and Neo Geo Pocket Color versions did).

Avatar, I see that you've put your copy of Twilight Symphony up for sale.  Did you end up not enjoying it as much as you expected to?