I've been giving the opportunity to start over with a new AD (2008R2). I want to do this mainly because the current AD (2000) is a mess. At present time the domain is staying the same but may be changed in the future. While I do want most of the users on the current AD, I definitely don't want all of them.
In your opinion would it be better to start again fresh, or migrate and deal with cleaning it up.
Any other suggestion or tips?