As much as I hate Jedi Rocks, Vader's Nooooo......? NOOOOOOOOOOOOOOO! is just on a completely different level of bad, definately the worst change of the ROTJ SE for me.
I own the blu-ray set of Star Wars but I've never been able to bring myself to watch ROTJ because of that change, I saw the clips on youtube when the blu-rays came out and it was the last straw for me.
I'd been able to put up with Hayden and Jedi Rocks in the previous releases but that change to such an iconic moment in the OT was just too much for me to bear.