Very interesting list. Half i've not seen, and some of them i know nothing about! So should be fascinating to explore but as you know the problem will always be with availability here. I see Vertov's Enthusiasm is now getting a British dvd release. I've been wanting to see a few from Kazakhstan, such as Fall of Otrar (Amirkulov). Kira Muratova is one director i'd like to get to know, cos many who've seen her films rate her highly don't they? I heard something about a short German season in London, but not sure if it's current/just finished.

For what it's worth, here are the ones i've enjoyed most:

Mirror (Tarkovsky)
Andrei Rublev (Tarkovsky)
The Colour of Pomegranates (Paradjanov)
Stalker (Tarkovsky)
Tale of Tales (Norstein)
Battleship Potemkin (Eisenstein)
Man with a Movie Camera (Vertov)
Alexander Nevsky (Eisentein)
Ivan the Terrible 1+ 2 (Eisenstein)
Salt for Svanetia (Kalatozov)
Nostalghia (Tarkovsky)
Fall of Leaves (Iosseliani)
Arsenal (Dovzhenko)
Ballad of a Soldier (Chukhrai)
Earth (Dovzhenko)
Come and See (Klimov)
Girl with a Hatbox (Barnet)
Ivan's Childhood (Tarkovsky)
Happiness (Medvedkin)
The Ascent (Shepitko)
Strike (Eisenstein)
Unfinished Piece for Player Piano (Mikhalkov)
I am Cuba (Kalatozov)
Shadows of Forgotten Ancestors (Paradjanov)
The Cranes are Flying (Kalatozov)
King Lear (Kozintsev)
Ashik Kerib (Paradjanov)
October (Eisenstein)
Daydreams (Bauer)
Child of the Big City (Bauer)
Twilight of a Woman's Soul (Bauer)
War and Peace (Bondarchuk)
Legend of the Suram Fortress (Paradjanov)
Solaris (Tarkovsky)
Storm over Asia (Pudovkin)
Aprile (Iosseliani)
Mother (Pudovkin)
Dark Eyes (Mikhalkov)
Outskirts (Barnet)

post-Soviet:
The Return (Zvyagintsev)
Burnt by the Sun (Mikhalkov)
Mother and Son (Sokurov)
Russian Ark (Sokurov)
The Thief (Chukhrai)
Of Freaks and Men (Balabanov)