Zend Studio

Recently i was looking for an IDE for Devloping Drupal based projects. Uptill now we are using Quanta Plus (on Red Hat / Fedora Linux ). It did great job, and it was cool to use this tool. Quanta as Syntax highliting, autocomplete, function references, HTML autocomplete, advances search/replace, Text coloring/highlighting and many such developer friendly features.

I just wanted to know what editors Drupal developers are using. Did some googling and found many recommendations and opinions.