Poll: Favorite Classic Giallo Film

According to Wikipedia: "Giallo (Italian pronunciation: [ˈdʒallo]; plural gialli) is the Italian term designating mystery fiction and thrillers. The word giallo is Italian for yellow. The term derives from a series of cheap paperback mystery and crime thriller novels with yellow covers that were popular in Italy." Which of these films is your favorite? Rules: 1) IMDb Rating of at least 6.0 2) Made in Italy and in Italian 3) Pre-1990 Note: These are the most voted films fitting the criteria. Discuss here