My only question is whether Faler switched to vi or emacs when he ditched Eclipse. If we're going to start flamewars with broad generalizations, perhaps we should do it properly (hmmm ... it appears I can troll effectively on HN without an IDE).

In the mean-time, I'd recommend the use of a good IDE and extensive test suite when you're refactoring. Use whatever you like (or are fastest in) when you're producing new code.