Best Documentary Feature

Here are the nominees for Best Documentary Feature. Which should win and why?

The Betrayal (Nerakhoon)
Encounters at the End of the World
The Garden
Man on Wire
Trouble the Water

Best Documentary Feature 2008

Here are the nominees for Best Documentary Feature. Which should win and why?

No End in Sight
Operation Homecoming: Writing the Wartime Experience
Sicko
Taxi to the Dark Side
War/Dance

Best Documentary Feature 2007

Here are the nominees for Best Documentary Feature. Which should win and why?

Best documentary feature
DELIVER US FROM EVIL
AN INCONVENIENT TRUTH
IRAQ IN FRAGMENTS
JESUS CAMP
MY COUNTRY, MY COUNTRY