Very good article! I plan to use at least 90% of these plugins to replace disqus and fb comments on a couple sites.

As I scrolled through the comments here, I did find a problem in that the "report" function does not have a confirmation popup and just touching it out of curiosity to see if there were reporting options, I actually sent a report through. Wonder how difficult a confirmation modal would be for this?

Other than that, they all look like solid value adds to the uber basic WP native comments system.