My Top 50 Epics (Defining epic as being over 17 minutes, with a few exceptions):

1. Supper's Ready - Genesis
2. The Gates Of Delirium / Soon - Yes
3. Thick As A Brick (Parts 1 & 2) - Jethro Tull
4. Echoes - Pink Floyd
5. Snowtorch (Parts 1 & 2) - Phideaux
6. The Revealing Science Of God - Yes
7. Tubular Bells (Parts 1 & 2) - Mike Oldfield
8. Close To The Edge - Yes
9. A Plague Of Lighthouse Keepers - Van der Graaf Generator
10. Awaken - Yes
11. Hamburger Concerto - Focus
12. The Sea Of Tranquility - Neograss
13. Hergest Ridge (Parts 1 & 2) - Mike Oldfield
14. Song Of Scheherazade - Renaissance
15. The Ikon - Utopia
16. Pudding En Gisteren - Supersister
17. In Held 'Twas I - Procol Harum
18. Nine Feet Underground - Caravan
19. The Remembering - Yes
20. Gullible's Travails - Motorspsycho
21. Chupacabras - Phideaux
22. The Rise Of Brighteye Brison - Brighteye Brison
23. Visions - Haken
24. The Underfall Yard - Big Big Train
25. Mei - Echolyn
26. The Ancient - Yes
27. Other Half Of The Sky - Moon Safari
28. Ritual - Yes
29. The Grand Event - Brighteye Brison
30. Numbers - The Flower Kings
31. K. A. (Parts 1-3) - Magma
32. Atom Heart Mother - Pink Floyd
33. We Spin The World - Moon Safari
34. Atlantis - Neograss
35. Love Is The Answer - The Flower Kings
36. Eruption - Focus
37. In Extremis - Days Between Stations
38. Suite: Little Lucid Moments - Motorpsycho
39. Mumps - Hatfield And The North
40. Clearlight Symphony (Parts 1 & 2) - Clearlight
41. The Harvest - Brighteye Brison
42. Ommadawn (Parts 1 & 2) - Mike Oldfield
43. Out-Bloody-Rageous - The Soft Machine
44. The Wide Open Sea - Big Big Train
45. Turn Of A Friendly Card - Alan Parsons Project
46. Incantations Parts 1-4) - Mike Oldfield
47. Ëmëhntëhtt-Ré (Parts 1-4) - Magma
48. Mind Drive - Yes
49. Song Of The Marching Children - Earth & Fire
50. That, That Is - Yes