@kaloschke, Unfortunately I don't get syntax highlighting in SS files, I just meant within my PHP Classes. Aptana does read my open SS files and provides any element ID's and Classes to the CSS code completion, which I thought was a nice touch.
I always thought Netbeans was for Java. Is there a PHP plugin or something? As it seems so popular I would be tempted to try it, but does it have:
* Integrated SVN
* Synchronization with remote servers
* Code completion that easily detects all classes in your project
If the answer is yes I will happily give it a go :)