An existing forum needs to migrate to a different type of software. I would like it to be similar in many ways, in its functioning, to Stack Exchange. But I can't propose it as a new SE site because it's not limited to sharing authoritative answers. It also functions as an internet support group for those who have a specific neurological condition, and their family members.
What software could be used to accomplish this? Currently vBulletin is used; I don't like it. I like the SE way of doing things better.
SE: I like the tags method of organization, the editing, the clean look, the voting; searching works great.
Why I can't use SE: the forum doesn't only provide factual information about the condition -- it also functions as a support group. That goes completely against the premises of the SE model.