Mac users who write LaTeX documents in Emacs (with or without AucTeX), please tell me about your workflow. My wife and I both recently switched (back) to Macs from Windows machines. We're mathematicians, and we both live -- or used to live -- pretty much completely inside an Emacs buffer, writing LaTeX. We've had a terrible time approximating our Windows setups on the new Macs. What Emacs version do you people use? (I've tried Aquamacs and Carbon Emacs.) What PDF previewer? (Skim, Preview, something else?) Most importantly: how is everything tied together, in your .emacs or elsewhere?

Finally, please help me understand what the point of AucTeX is. Both the emacs versions I've tried come with it pre-installed. So far, all I can see is that it adds unnecesary keystrokes when I want to typeset something, and destroys all my useful muscle-memory. Do you use it? Does it make your life better/easier?