(I will try and concentrate only on suggestions concerning xenForo, but since I am still not quite over vB4: Internet Brands released their CMS even without thinking of static pages... see here and (with all respect to the developer involved, because he approach us himself about it, but...) this is also quite remarkable that we have to explain to them what static pages actually are . Often one get's the feeling we as customers need to take on the role of Product Advisor or constant Beta Tester over there. Frustrating and tiring to say the least... I am forever thankful we now have a serious alternative produced by people who actually understand what they are doing and doing it with such a perfection!)
Having said that: I am unable to switch to xenForo because it has no CMS solution (being it a bridge to Wordpress or an in-house integrated product) and -even more importantly- no integrated Blogs. If we want to make much more vBulletin and Invision customers interested, I strongly believe both products are necessary.
I think there's a BIG difference. Static pages are pages that can be constructed by the admin. Members can not. Integrated Blogs offers all members the possibility to have their own 'area' on your social platform.
You can just add a new node > child > forum > and display it (or not). And update the page with a query to list last few comments, and link to leave a comment (which goes to that forum).
A dirty way, but possible.