There isn't one. I believe your best bet is to try a few and see what works for you based on your own preferences.
Netbeans is liked by a lot of folks, but so is Emacs, etc. etc.
If you don't know how to use Emacs, you may have to spend some time learning it (the same can be said for any IDE you may choose), but I think in the end you would find it a worthwhile investment in your time.
You could argue that more software has been written using Emacs than anything else.