1.Conversation
2.Jacob's Ladder
3.M
Jacob's Ladder - Really fucking good, and pretty scary. Good acting by Tim Robbins.
Exterminating Angel - I dunno, I thought this was overrated. I'm not a Bunuel fan, I dunno his movies just don't "click" or whatever with me.
Peeping Tom - I saw this a loooong time ago and don't remember much except I liked it okay.
Tesis - This RULES. One of the best endings ever
Seven Samurai - Don't see it. Its overated crap. Horrible acting
M - I love this movie, you might think it's boring, since I've heard you call some older films boring, but this is a classic.
Conversation - Easily the best movie listed. Outstanding acting by Gene Hackman and John Cazale

Seventh Seal - It's great visually, not really a great movie but worth checking out for the pictures
Together - haven't seen
Dancer in the dark - This is the saddest movie ever.