When I first saw the SE in 1997, I remember the new ending really hit me. It just felt so right. The music was happy, but sad at the same time. Which to me, fit the whole idea of the end of a huge battle where many friends were lost, a bittersweet moment.
Since then, I have come to dislike the SE greatly, and don't want to have anything to do with it, expect for that one scene. I still felt the music was a vast improvement over Yub Nub.
However... just now I watched that youtube clip of the 2004 ending, and was blown away by how amazingly, mind boggling awful it was. Then I went back and checked out the 1997 version, and thought it was brilliant. Other than the obvious changes, I can't pin down a difference between the two, but the 1997 version just really works for me while the 2004 irks the crap out of me. Just rewatched the 83 version too, and still feel Yub Nub is total shit (except when Craig Kilborn* sings it, then it is the shit!).
So, B for me.
Also, is it just me, or is the appearance of Naboo just one too many planets? I think we need a shot of Hoth, with two or three wampas feeding on a tauntaun carcass, blood smeared all over their faces, followed by a shot of Alderan's debree field. Hope these scenes get included in the SE 3.0, I think they'll add a much needed sense of completeness to the ending of ROTJ.
*Craig Kilborn version found here ---> http://blogs.abcnews.com/politicalpunch/2007/03/yub_nub.html
Incidentally, the link also includes an English translation of Yub Nub, something I had no idea existed. Pretty crazy stuff. Some really weird stuff happened to my brain while reading them. Now that I know the words to the song, I realize how unbelieveable powerful it is, and see why it is necessary that this remains the true ending to the Star Wars trilogy. In fact, realizing I have gone my entire life without ever reading these lyrics, and not knowing them by heart, I no longer feel worthy to call myself a Star Wars fan, and will therefore be leaving ot.com forever. Farewell guys.