did u ever use Maguma Workbench?
i think u guys should give it a shot.
it has excellent features like ClassBrowser, FileManager,RemoteBrowser (supporting both FTP and SFTP),FunctionList(list of PHP functions and user defined function),CVSManager,Workspace (for project),Snippets,XDebug etc. u can use ClassWizard, HTML Tidy,AutoCompletion within this product for fast scripting.
the product is very much stable,easy to use ..... excellent drag and drop features for both text and file has been incorporated within this product.
u can visit the community and forum of the site Maguma