I love your double feature approach, and the commentary on each: you should … or perahps you do … write movie reviews for your local paper.
I saw your “unseen” list and if you allow me … not like you have a choice :-) ... I’d like to make a couple of comments and add a couple of suggestions:
Alien (do Aliens also: two very different films same characters)
Apocalypse Now (Redux … the “regular” version makes no sense)
Audition (good … thrilling)
Blade Runner (good)
Das Boot (good, but boring)
Brazil (not my thing)
Clash of the Titans (the 1981 version. Yes, the effects are nothing but it is a better movie)
Close Encounters of the Third Kind (classic)
The Deer Hunter (awesome, thrilling and depressing)
Deliverance (“you got a pruddy mouth boy” ... stupid but a classic)
Do the Right Thing (ice cubes have a new meaning for me now :-)
Evil Dead 2 (don’t bother … unless you found the first one entertaining.
The Godfather, Part I
The Godfather, Part 2 (see them together and forget Part 3 was ever made).
Kind Hearts and Coronets
National Lampoon’s Animal House (classic, very funny)
The Night of the Hunter
North by Northwest (classic. Add Vertigo and make it a Hitchcock double feature)
O Brother, Where Art Thou? (fantastic and very funny)
The Omen (1976)
A Passage to India
The Ring (stupid)
The Shining (awsome)
The Texas Chainsaw Massacre (1974) (really? ... you might as well make it a douple feature with Halloween, Friday the 13th, Nightmare on Elm St. or The Hills have Eyes(1977)
The Thing (1982 version is awesome. 2011 version is a decent prequel, worth a double feature, but see the 1986 movie first)
I noticed no Tarantino:
must see = Reservoir Dogs and Pulp Fiction.
good = True Romance and FRom Dusk ‘till Dawn
OK = Kill Bill 1 & 2
War movies: Private Ryan, Tora Tora Tora, River Kwai, When we were Soldiers, Patton.
Sub movies (besides Das Boot): Hunt for Red October, The Abyss, Operation PettiCoat, Crimson Tide.
Classics: CasaBlanca, The Maltese Falcon and Some Like it Hot.
... I could go on, but maybe you can look at the AFI 250 for guidance.
Enjoy; this is a great goal. 10 months ago