To be honest we can't go wrong with notepad++. Ultra fast, simple and has quite a few plugins to extend basic functionality. I can't offer an unbiased opinion as I have only used a few editors - DW, notepad++ and Zend Studio 7,8. I can't stand DW and I work with ZS on my main projects but mainly due to using Zend Framework so it all integrates very nicely. That, with project specific settings and sessions etc AND the incredibly customizable template code insertions makes it a breeze to develop in. I might move onto DW again if the next trial version impresses me.