Metadot is a very professional Perl CMS, and I woul strongly recommend you to try it. I would also recommend you to try WebAPP, Open Source, Multilingual Perl, CMS Portal from
http://www.web-app.net
You can not compare PHP scripts to Perl scripts. I mean that Perl is less buggy, much safer and faster. It also has infinite amount of addons as it has been out there for ages.