I like to have the following heirarchy, and thought others may also:

track artist (lowercase)/track artist - album title - number - track title

This can be accomplished by editing src/sj-prefs.c and adding to path_patterns:
{N_("Track Artist (lowercase)"), "%tS"},

and to file_patterns:
{N_("Track Artist - Album Title - Number - Track Title"), "%ta - %at - %tN - %tt"},

Great app and nice design since that is all I had to do to get sound juicer to do exactly what I wanted it to do.