All the above mentioned moments are great! I can only think of a few right now but I'm sure I'll post more later as I think of them.
1. Lightning Lad and Saturn Girl's wedding being interrupted immediately after they are pronouced married. Plus this happened in one of my all-time favourite Legion special edition books ever made.
2. Karate Kid's noble death scene. This had quite an impact on me as a kid because Val is and always will be my favourite Legionnaire (and I'm not even into martial arts or ever have been).
3. Dream Girl becoming Legion leader, and then quickly having to take control of a really bad situation while the universe was coming down around her and her teammates. I knew back then when I voted for her that she was the right choice and she proved again and again.
We haven't seen another strong Nura again after that until Waid introduced us to the threeboot Nura who, in my opinion, was one of the strongest characters of that whole run. Too bad she was "cut down" so early in the series. Major shame.