for full blown application - i would use Zend Studio for it's auto completion capability, Go to definition and the Debug options
I tried some of the other ides mentioned and PhpEd is still the best for me. I am also going to find me a smaller editor with for the quick edit moments. I am surprised how many people use notepad and equivalent editors. I never paid much attention to the IDE until I started using Visual Studio 2005. VS2005 allowed me to stop thinking about the layout of my code and concentrate on the logic of my codes. If you put a value on your time then invest in a professional editor.
I looked at Dreamweaver cs3 but it didn't have a debugger, not that I could find it anyway. Which is a shame, I thought Adobe would do a better job with dreamwever. Maybe because Adobe has coldfusion and is bias to that language.
I use PhpEd, the debugger is awesome. I like managing the projects (compared to using windoze notepad.exe) it is great for large applications. Notepad++ is still great though for short scripts
olddocks, that link you had in your post doesn't work, I am really keen to see your list, can you let me know if it is at a new address? Cheers.
I am using phped now. I got it to work with wampserver so I can debug with mod_rewrite. The builtin debugger doesn't support php extensions. I also use firebug to troubleshoot ajax features.
For php, we use Macromedia Dreamweaver 8 at our company. For asp.net, we use visual web developer 2008.