Cerebral movies

I really enjoy watching movies that are highly intellectually stimulating and that keep you speculating till the end like inception and shutter island. After searching on the net, finally I hit upon the right term "Cerebral movies".

Here are some of the recent ones which Ive really enjoyed:

1. Lost in Translation
2. Being John Malcovich
3. Mr Nobody
4. Travelers and Magicians
5. Siddharta 1974
6. Seven years in Tibet
7. A Man from earth
8. Inception
9. Waking life
10. Shutter island
11. Eternal sunshine of the spotless mind
12. Vanilla sky, Open your eyes
13. Matrix
14. Truman show
15. Before sunrise
16. Before sunset
17. Batman Begins, The dark knight, Batman Returns
18. Children of men
19. The lives of others
20. Altered states 1980
21. eXisTenz (kina mind fucking but has scope for metaphors)
22. The incredible shrinking man
23. Into the wild
24. Powder 1995
25. The Exam
26. Donnie Drako
27. In time 
28. Before Midnight
29. Cider house rules
30. Groundhog day
31. Perfect Sense
32. Click
33. Phenomenon
34. Meetings with Remarkable men
35. Good Will Hunting
36. Groundhog day
37. Being John Malkovich
38. The Never Ending Story
39. A clockwork orange
40. Life of a Pie
41. Cube
42. Exam
43. The lives of others
44. The Tree of Life
45. Zenith
46. Limitless
47. Cast Away
48. My Dinner with Andre