I saw Avartar two weeks ago

I saw movie Avatar 2D eventually. i wanted to see the 3D version but I don't have appropriate time to see it. I watched it with my colleagues in my company. I'm wonder whether I need to see it again as the 3D-version. If there is anybody who has opinion about it, please let me know it whether I need to see it again or not as the 3D-version.