Entertainment Weekly just came out with the top Sci-Fi 25 movies and tv programs:

1) The Matrix (1999)
2) Battlestar Gallactica (2003-present)
3) Blade Runner (1982)
4) The X-Files (1993- 2002)
5) Star Trek 2: The Wrath of Kahn (1982)
6) Brazil (1985)
7) E.T. (1982)
8) Star Trek: The Next Generation (1987-1994)
9) Aliens (1986)
10) The Thing (1982)
11) Lost (2004-present)
12) Back To The Future (1985)
13) The Terminator/Terminator 2 (1984/1991)
14) Children of Men (2006)
15) Firefly/Serenity (2002/2005)
16) Total Recall (1990)
17) Eternal Sunshine of the Spotless Mind (2004)
18) Heroes (2006-present)
19) Starship Troopers (1997)
20) Star Wars: Clone Wars (2003-2005)
21) Futurama (1999-2003)
22) Quantum Leap (1989-1993)
23) Dr. Who (1963-present)
24) Galaxy Quest (1999)
25) V: The Miniseries (1983)