As I mentioned a few times previously, I would not put Joomla & Drupal in the same category as WordPress. WordPress is built for Blogging specifically, not as a full blown CMS with a very broad set of extensions and usage capabilities.
1. For content only, and simplicity, go with WordPress, unless you are extremely comfortable with the others.
2. Pick Joomla or Drupal, and stick with them. They have learning curves. Don't like the term steep.
The more you work with them, the more comfortable you'll feel.
3. I personally work with WordPress and Joomla.
4. Joomla has a massive set of extensions, and templates.
5. One problem I have is going overboard. Don't overkill, i.e., plan on too much, this is very easy with Joomla due to the massive set of extensions. Blogging, articles, rss feeds, static pages, e-commerce, forums, multi-templates, multi-lingual, etc.; background - stats, etc.
Here is a Joomla-Drupal comparison link,
http://cmsreport.com/node/543
which I posted here:
http://www.dnforum.com/f472/easiest-...ad-227954.html
You should look here as well:
http://www.dnforum.com/f123/content-...ad-282113.html
I've heard that the Joomla and Drupal teams work together.
Also, I would suggest getting a paid template. Look at one of the template providers, for a solution your interested in.
Here's another link:
http://drupal.org/node/101507