Even with IntelliJ and IdeaVim, if you ever need Sublime Text, you can easily switch to it temporarily using IntelliJ's External Editors feature. This will let you edit the file neatly in the external editor and return easily to the IntelliJ window.
Go to Preferences > Tools > External Editors
Add a new entry called Sublime Text
Turn off ‘Open Console’
Set program to /Applications/Sublime Text.app/Contents/SharedSupport/bin/subl
Set Parameters to $FilePath$
Once you use intelliJ IDEA, it's very hard to switch again, because there's so much that you feel missing...