Should definetely see Michelangelo Antonioni's Blow Up, his best. Has David Hemmings in his prime.
Fellini's Satyricon and 8 1/2
I got a really good DVD recently called "Spirits of the Dead" and it has Fellini, Roger Vadim (French director - did Barbarella), Louis Malle (also French director - did Viva Maria w/ Bardot and Jeanne Moreau which is good) - and they all do their own takes on Edgar Allan Poe stories... actors are - Brigitte Bardot, Terence Stamp (hottt!!), Alain Delon (also hot), Jane Fonda, Peter Fonda... really fucking good.
Does Italian horror count in this conversation?