The great thing about evil is you can enable it in your .emacs and it mostly just works. But even better, because this is Emacs the vi layer is also easily extendable. Here's an example of adding other operators (adding `mit`, `mit>` etc): https://github.com/ZaneA/Dotfiles/blob/1858a02de25e25de20e96...

I'm tempted by emacs/evil as well, but everytime I try to make the switch I run into two problems:

1) intial emacs setup: it feels really tricky to just get basic editor sanity configured (auto-indent, syntax highlighting, etc.)

2) I worry that by using evil mode, I lose out on a lot of the goodness of emacs major and minor mode's. Do you remap everything to be more vi-ish for each mode that you use? I guess that is fine but the transition just seems daunting.

I second the idea of using Prelude to start with Emacs, along with the package manager which makes the initial setup and adding modes/stuff very easy (see http://melpa.milkbox.net).

I haven't seen any lost functionality by using evil; modes that define bindings continue to work, and the usual C-x/C-c/M-x/whatever works fine with evil. There is the odd major mode that doesn't work with evil out of the box (usually if it redefines j/k) but most have no problems. You can still use most (all?) regular Emacs movement commands with evil as well.

Prelude[1] is a great way to start with emacs. I don't have any experience with evil, though.

http://batsov.com/prelude/