Yes, I realize Jeff's comparison is 2 years old. That's why I was wondering if anyone has done or would be willing to do an updated test of a similar type, maybe just in comparison to RS Firewall or the more comparable OSE Anti-Hacker, neither of which I've ever tried. (No demo, or not very good demos + high prices.) Biziant had some cool, original features when it came out and some good UI design concepts, but it's still in alpha. Jeff says he hopes to reconstruct it as a platform-independent application.
In the past multiple security extensions made a certain amount of sense, since there were no really comprehensive solutions. Surprisingly, I never had problems with conflicts, and the better ones all send out email alerts and/or create logs that make it clear which one is blocking a request. Nowadays all I use (usually) is ATP, some anti-spam tools, and jMonitoring or hosted services like pingdom and websitedefender.