spacemacs! I was a long-time vim+tmux diehard and now i'm all about spacemacs. Org-mode and Magit are just too good to live without. There were a few hurdles when switching, mainly around auto-indent differences that were harder to configure with emacs. (dtrt-indent ftw, thank god for that). Also the regexes are different and not as good (i don't think emacs regexes do negative lookahead etc...) so some of the advanced substitution wizardry i used to do isn't quite as good.

But overall i prefer Spacemacs to vim for general development.

I recommend using the develop branch of spacemacs. It sometimes breaks but if there is something broken it gets fixed really fast, whereas if something is broken on master then it sometimes stays broken for a really long time.