I vote drupal also... its crazy.. check it out. Also, is wordpress "really" a cms? I suppose it is but only for one type of content... blogs. Once you want more than that... it gets kinda hackish.
How many big companies use wordpress for there sites (other than blogs... thats the kicker hu)? Anyone know? I'm betting not to many. Here are some big name companies using drupal (links on this post): http://forums.digitalpoint.com/showpost.php?p=9975395&postcount=48
I learned Joomla in less than a week to build a basic site, so that's great. To do more advanced stuff it took me a little longer, but still, learning curve of Joomla is not as steep as some other CMS.
Joomla is quite easy, but it's getting harder to design own template. Now I am learning Drupal, has many good modules.