Of course the first option is wordpress, but the second version I heard too much negative feedback related to performance. The blog is not for me, therefore, to say what there will be attendance can not, and to know that at least some could not :) But preferably something easy since it is unlikely they will take a powerful hosting.
As with the performance in the third version?
The second variant came to mind — drupal, somewhere in the same weight class, unfortunately, though I really like it.
Actually... I especially do not know what to choose, since blogging never really interested in. What are the options?
Or maybe with WordPress/Drupal is not so bad as I think and take them?