Hi jaydenblair, vBulletin used to rule. I have a friend that has been with a vbulletin more than 10 years, he says it's the best. I've used vbulletin and I fall in love with its usability. IPB is very strange, very big, very powerful, but it still has 'something' that makes me no-no. Xenforo it's a new alternative Good luck !!
the thing about vb and ipb is like the thing between iphone and android iphone has a lot of apps and its a cute thing. android is still not that interesting even if it has a better engine. vb has many many forums talking about it, and there are thousands of developpers making mods and plugins. but there is not much people developping ipb plugins. so if you dont need specific options that does not exist in ipb engine, i think it is much better than vb. and am talking from experiace i have with forums (7 yrs)