Bouchon or Boulud?
I prefer Daniel Boulud, but not by a huge margin. They're both French, they're both informal, and they're similarly priced. To me, the dishes at Daniel Boulud are a little more interesting, and a little better. DB's atmosphere is good for dinner, especially if you snag a table outside.
However, if at all possible, go to Bouchon for breakfast. It's the best in town.
For details of my meals at these places (and others), go to my page of restaurant reviews at http://home.comcast.net/~lasvegasvaca... .