Akira, i am not sure what you mean? you think most YM composers are bad?
I think the Atari ST musicscene is great at the moment, it's just not as many composers as for SID. the sid-voice technic is over 12 years old and digidrums even much older so the composers know what to use when composing and digidrums is not always used.
actually lately there is a new generation of composers on the ST who likes the digidrums technic because it fits their style of music.
like this music (has an experimental touch to it) :