I've used emacs solely for orgmode over the last year and I'm not sure I'd recommend it whole-heartedly. Orgmode is great, but the emacs learning curve is steep and unforgiving. It still feels as if I'm faking my way through an ancient language whenever I fumble through keyboard "shortcuts".

That said, it's incredibly powerful. Wouldn't continue to torture myself if it wasn't. I like the plain text files, the authoring experience (the document feels alive somehow), and I've never been more organized. I just wish it existed outside emacs!

If you're only using Emacs for OrgMode, my answer is an resolute, "No". You're far better finding a tool that fits in with your current workflow.

The last time we had a post about Emacs, I wrote a rather long winded response, but the summation of it was this: the value in investing in tools like Sublime Text, Vim, Emacs, etc is when you can pile as much of your workflow into that tool is possible. The power of Emacs is that it is a completely customizable tool. It's primary purpose, of course, is to be a text editor, but you can configure it to be an email reader, web browsing client, note taking tool, it can run external commands, etc. It's powerful, and it can literally be the only application you have open.

The downfall with Emacs is that integrating it in certain environments, namely Windows, is not a trivial matter. I use Visual Studio, Outlook, and Lync at work. I could configure all of that to run in Emacs, but then I'd be taked with maintaining that in addition to my own work.

Yes. I would say it's worth learning. The best way to learn emacs is to use it everyday. When you're comfortable enough, then you can start learning org-mode. You'll be much more productive eventually after you discovered what org-mode can do.