Support Forum

I am looking for some online software, whether it be a module or standalone that will allow people to post topics, have people accept a challenge to the topic and then people vote on whose argument they like better... or something close to it.

Any ideas??

How about a forum module that allows users to post threads with voting options?

Well basically if you look at http://www.fannation.com thats kinda what i am looking for. I just dont know if there is anything out there. What I want it if I post something like...

"Red is the best color ever" - exuberocity

Someone can come and challenge that and then noone else can post in that thread. Its only myself and the person challenging it. People vote on who made the best argument.. etc.