The Official Cult Labs Dario Argento Roll of Honour. 1 - Suspiria (1977) - 22.30
2 - Tenebre (1982) - 21.90
3 - Deep Red (1975) - 21.53
4 - Inferno (1980) - 20.75
5 - The Bird with the Crystal Plumage (1970) - 19.78
6 - Opera (1987) - 18.84
7 - Phenomena (1985) - 18.70
8 - Four Flies on Grey Velvet (1971) - 16.80
9 - Sleepless (2001) - 15.90
10 - Mother of Tears (2007) - 15.44
11 - The Cat o' Nine Tails (1971) - 15.37
12 - The Stendhal Syndrome (1996) - 14.88
13 - The Tram (1973) - 14.50
14 - Pelts (2006) - 14.20
15 - Two Evil Eyes -The Black Cat (1990) - 13.80
16 - Trauma (1993) - 13.25
17 - The Eyewitness (1973) - 11.50
18 - Jenifer (2005) - 11.16
19 - Dracula 3D (2012) - 9.00
20 - Do You Like Hitchcock? (2005) - 8.66
21 - The Phantom of the Opera (1998) - 8.57
22 - The Card Player (2004) - 7.83
23 - Giallo (2009) - 6.20
The films were scored from 24 - 1, first being 24, then divided by the number of voters.
Five Days in Milan (1973) failed to register a single score. I'm thinking it seriously needs a disc release of some sorts.