I've really had to play with enough languages in the last few years that IDEs are just more trouble than they are worth to me. The editing isn't great, the tools are sketch, and the design of visual space tends to be poor. And always being on the tool learning-curve gets old...

So I stick with emacs and my primary IDE-esque tools are syntax highlighting and hippie-expand. The only time I break out of my emacs world is to run debuggers.