Need the best looking one- was thinking joomla w/cb, but just wanting to see what else was out there. It doesn't have to be vbulletin for the forum, we will not be using 4. Need mobi, fb, and twitter integration also.
check boonex, phpfox, socialengine. Pretty sure boonex has all the features you mentioned. The latest version of phpfox has Fb and mobi. Check it out on my site.
If you want to use Joomla try Mighty Touch, together with Mighty Resources you don't need any other forum extensions.