I would stay SATB piano: 21-30 Singers
Don't worry about me ABar piano: 71-80 Singers
Everybody needs somebody SSAA piano: 51-60 singers
Aquarius SATB piano: 61-70 Singers
Mannenharten SATB piano: 101-150 Singers
Everybody needs somebody SSAA piano: 41-50 Singers
Heal the world SSAA piano: 31-40 Singers