I don't mean to sound like a troll, sorry if I do, I just want an answer.
IPB plus IP.Content comes to a total of $200. This is the same price as vBulletin without any publishing features. Even vB Publishing Suite doesn't offer a real CMS, from what I can tell, it's just an 'article manager'.
Since you're charging a premium over IPB, I ask, what do you offer over them? I'm torn between vB and IPB right now, so I'm curious what I'd get over here by paying the $50-$85 premium.