It's going to depend a lot on your preferences... if you harvest early (when the trichs are all milky), you'll get the energizing/head effects from your grow... if you wait until 10-20% have turned from milky to amber, you'll have a nice, balanced high - the cerebral effects WITH a relaxation... And if you wait until they're mostly amber, well, make sure your couch is comfortable! :-D
Your choice... there IS no "better" .. it's all in what you want to achieve.
Good luck!