[Haskell-cafe] Editors for Haskell

All, I hope that this is the right place for this question. I'm using Haskell (GHC and Hugs) on several different platforms. Windows, OS X and Linux systems. I'd like to have an IDE that works well for medium to large size projects. I know of Eclipse and hIDE. Vim works fine but I'd like more. hiDE seems to be "in process." What would you suggest? I'll be asking my students to use the same IDE. Thanks, Walt