I am really falling in love with Spacemacs (Emacs+Vim) since I made the move last night to try this out as my IDE of choice.
I think one of the big factors that stopped me from using VIM more often was two fold: 1) Setup to get it working witht he basic features of a IDE were a pain 2) it is really ugly without enough at-a-glance useful info. Spacemacs solves both those problems.
The only thing I'm learning to do without right now are tabs for multiple files at the same time. Yea you can have buffers and even have them open side by side, so I'll probably make do. But multiple buffers feel like more of a mental effort to maintain than tabs.