I use drupal and I can give you the pros of drupal. I will need to do this another time as I have already had about 6 beers at happy hour and am going out more to meet up with some people.
One huge thing about drupal, is their documentation with their modules and how they look at updates. Also, drupal is a full force framework, so it allows you to make it your own.
I will extrapolate more when I am more sober.