Bold: read.
Italicised: own but not read yet.

50. Embassytown
49. Zoo City
48. The Windup Girl
47. Uplift: Book 1: Sundiver
46. The Reality Dysfunction
45. Cat's Cradle
44. SF Masterworks: The Difference Engine
43. SF Masterworks: Centauri Device
42. The Drowned World
41. SF Masterworks: Pavane
40. Make Room! Make Room!
39. The Player Of Games
38. Altered Carbon
37. SF Masterworks: Dying Inside
36. The Hitchhiker's Guide to the Galaxy: The Trilogy Of Four

35. SF Masterworks: Blood Music
34. S.F. Masterworks: Lord Of Light
33. SF Masterworks: Rendezvous With Rama

32. Zones Of Thought: A Fire Upon The Deep & A Deepness In The Sky
31. Mars: Book 1: Red Mars
30. SF Masterworks: Ubik
29. Fahrenheit 451
28. The Death Of Grass
27. SF Masterworks: Inverted World
26. SF Masterworks: The Female Man
25. SF Masterworks: Helliconia: Hellonica Spring, Helliconia Summer, & Helliconia Winter
24. S.F. Masterworks: I Am Legend
23. Day Of The Triffids
22. War Of The Worlds
21. The Moon Is A Harsh Mistress
20. A Canticle For Leibowitz
19. Ender's Game

18. Snow Crash
17. Foundation
16. S.F. Masterworks: The Stars My Destination

15. SF Masterworks: Flowers For Algernon
14. SF Masterworks: Stand On Zanzibar
13. Left Hand Of Darkness
12. S.F. Masterworks: Babel 17
11. Ringworld
10. SF Masterworks: Timescape
9. Childhood's End
8. The Man In The High Castle
7. S.F. Masterworks: Gateway
6. SF Masterworks: Dispossed
5. SF Masterworks: The Demolished Man
4. Neuromancer
3. Fantasy Masterworks: Book Of The New Sun Book 1 & Shadow & Claw Book 1
2. S.F. Masterworks: The Forever War
1. Dune

An odd list in places. What the heck is Sundiver doing on there? It's probably Brin's weakest novel. Startide Rising and The Uplift War are comprehensively superior on every level (they're also festooned with awards and critical praise, whilst Sundiver isn't).

I'm also really confused by their eligibility criteria. Why just the first half of The Book of the New Sun when the four volumes really do form one continuous story? Why not the omnibus of all four? And why the first four HHGTTG books when it's a five-book series but only the first two have widespread acclaim? Also, The Wind-Up Girl seems to be as much hated and loathed as it is acclaimed, which makes it an odd book to put in there, and Foundation being so high definitely makes the list questionable (it hasn't aged well at all).

Also, isn't Harrison's Light a lot more critically-acclaimed than The Centauri Device (which I believe the author has disowned)?

Also, no Beggars in Spain or Doomsday Book? And Timescape really isn't so good as to warrant a Top 10 spot.