Cooper, Reynolds, or Timberlake — Who Should Play Green Lantern?

Apparently Warner Bros. has spent "the past five months searching for the actor to play Hal Jordan, the hot-shot Air Force pilot who is chosen by a dying alien to be his successor in an intergalactic police force known as the Green Lanterns." Now the list has shortened to three names: Bradley Cooper, Ryan Reynolds, and Justin Timberlake.

The director, one of the producers and the studio each have a different favorite among the three, and they're having a difficult time coming to an agreement. Budget may be another consideration, as Green Lantern will reportedly be "a full-blown space epic that is expected to cost between $150 million and $200 million."

Ryan Reynolds has proven he can play a comic book character; do you think Bradley Cooper or Justin Timberlake could also do well with this kind of role? Who should be cast as the Green Lantern?