A few years ago I was an Emacs user too, so I'm not surprised of these answers. In the last 4 years, my job moved to windows, and I have worked mainly on C# and .NET so that I've become a kind of VisualStudio addict. Still I used Spyder for scientifical computing and jEdit a lot for casual editing on windows.

There are a few features that I think are important for professional development:

- debugging support

- project management (should I really learn cabal packaging?)

- underline sintactic errors

- code navigation

- autocompletion (based on scope)

- testing integration

Optional valuable features

- syntax highlight

- section folds

I'm using Leksah, right now, but I'm still not satisfied. This despite the hard and respectful work of the author.

I'd like to have an excuse to use Emacs (or vim) at work (windows) and at home (Linux), but I'm not sure that it satisfies these basic requirements. Any "ready to use" .emacs for Haskell?