Why I'm learning Emacs
isaacsu.com
isaacsu.com
Also, it's pretty hard to judge how suitable a tool as versatile as Emacs is to your task without already being at least familiar with it.
Ultimately, I'm a big fan of trying to use new stuff "just because". I've found some of my favorite tools this way: Haskell, Emacs and even Linux.
However, there is one world-changing programmer that I know of (and I would guess there are likely others) that is rumored to have used VI and not emacs. As I understand it, Paul Graham used (uses?) VI and not emacs. Oh, another is Cutler, writer of more OS systems than most of us have ever used: RSTS-11, Vax VMS, and Windows NT. He uses Slick Edit. I am sure the list goes on. Where I work, primary editors include Pico, Textmate, Emacs, vim, sublime.
Presumably you are here to build amazing stuff, and unless your Amazing Stuff is a world-beating editor, your editor is not your job. So don't get too hung up on the editor. Lots of good ones out there.
Emacs clearly has the superior extension mechanism, especially if you're writing a lisp of some sort. But I believe vim clearly has the superior key bindings.