so I can't compare. From everything I have heard Emacs is tremendously productive. Note, the developers at Infoworld are using Ultraedit and VI (as well as Emacs). There is no way that VI or Ultraedit is as productive.
then I would have to disagree. VIM has syntax checking (nice pretty colors to show you your errors).
The only thing that an IDE has that VIM doesn't (for me), is a nice way to profile the code so that I could tell what sections of code were taking the longest.