What movies should I get?

Psycho, The Shining, A Clockwork Orange, Do the Right Thing, Requiem for a Dream, The Shawshank Redemption and Leon are the best films from that list in my opinion. You should definitely check out Fargo as well, another great film from the 90s. Eraserhead is good but it's really weird - Blue Velvet is a better movie for me.