I've tried them all and keep coming back to VIM. You can get intelli-sense, err I mean code completion and it integrates right into VIM. It's just fast and minimal. It just works.

Maybe it's just me, but I actually find the intelli-sense annoying in vim. I prefer the normal ctrl-n/-p without the popup (too distracting/slow/etc).

ctags + taglist (http://vim-taglist.sourceforge.net) and a proper .vimrc and .vim/plugins cover mostly everything you might need.