I installed macports and emacs and kept using OSX like any other unix-like terminal. But in all honesty I prefer my freebsd box for dev over my osx laptop. Using standard unix foo on OSX isn't quite as clean as it is on bsd.

Except for the nice iphoto,safari,mail experiences where it's better to treat it like a nice GUI, they've done a pretty good job. If you're not happy with it, just go back to linux for dev and keep on with osx for your phone sync and media. Why make life hard for yourself?