vBulletin's main rival, Invision Power has a gallery, topsites, chat all intergrated with their forums using a system called "converge".
vBulletin, esp v3 as I found out is much more flexible than IPB, well, IPB 1.x.x, not sure about the new version 2, as they stopped offering free unlimited "trials". I'm not sure about dating/classifieds, but I use vbulletin - forums, coppermine - images, cgiirc - chat (most people, like myself, dislike Java Applets).
Edit:. For CMS I'm sure vBAdvanced would work pretty well. ^^
|