My search for the perfect editor has finally come to an end. Yesterday I found it and it is called NetBeans IDE 6.5.
I downloaded and installed the package for PHP development. It simply does so much right. Its project management, symbol lookups, code completion, in-file searches, across-files searches and source navigation are superb. Using its PHP debugger to debug my local apache server was a breeze and its MySQL client is excellent.
If you come across the strange JDK rendering problem you can find the fix here: http://forums.netbeans.org/topic4851-0-asc-15.html