Why do you need to "standardise" on a Java IDE? Do you standardise on vi, emacs, or Notepad? Can't developers simply use whichever IDE they prefer, keeping the code formatted in the desired format?
Pair-programming teams often standardize on an IDE, so that when you hand the keyboard to your pair, they don't have to exit your IDE and start up theirs in order to type the next few lines of code. Standardizing on Notepad is a bad idea, because there's no way to enhance it to meet your team needs better.
