After working with Drupal CMS for a couple of months I'm amazed of how well this system is designed and by level of support I'm getting from the Drupal community. I'm fully convinced that currently Drupal is the most efficient way for creating and making available content on the web. My only problem with Drupal is a database overhead produced by this CMS for sessions and cache management.
This however seems to be resolved in the next version of this CMS - Drupal 5, which currently is in the beta 1 stage.