Fantasy Zone Seriously, they did nearly everything in that game right, but messed up horribly in the sound department. The original compositions were LEGENDARY and even the SMS version sounded much better, not to mention the Famicom version sounded AWESOME. I think this was NEC Avenue's first published game, but still this is unforgivable.
As I'm sort of a collector of CD games I haven't tried many HuCard games, but I remember that Cyber Core had some nice tracks (probably not stellar, but still nice), and the arrangements in Salamander held up well compared to the Arcade version.