I currently use Zend PHP Studio because I like it's syntax highlighting, its keyboard shortcuts, its autocomplete, and its integrated php documentation. What I don't like about it is the interface or the feel of the software. It feels like it's been written in Java - eww.
Can anyone recommend to me a really good php editor? Dreamweaver is out only because I don't think they have any autocomplete or autosuggest features for the php language.