What does it take to turn a Mac into a decent programming environment?

I’ve already installed Xcode from the App store, but I need some editors, compilers and version control.

• XTerm2 - terminal with neat features like replay (scrolling meets TimeMachine!)
• Emacs (Aquamacs) - an editor
• VIM - another editor (not actually installed yet - will need to build from source)
• GitX (Laullon fork) - GUI for GIT distributed version control system
• HomeBrew - an alternative to Mac Ports (haven’t decided which I prefer)
• Scala - programming language
  • brew install scala
  • First time you run ‘scala’ it installs a JDK
• Haskell - programming language
  • brew install ghc
  • brew install haskell-platform
• ReStructuredText - converts traditionally formatted text files to HTML
  • sudo easy_install pip
  • sudo pip install docutils