smart man will use
xenforo 
( simple, faster and
I heard a bunch of develloper of VB haved migrate long ago at xenforo )
If you venture in the vbulletin, here few advice for you ;
1 - i hope you know coding and etc ... vbulletin is a complicated script
2 - if you don't know code; YOU NEED A FAT WALLET, cuz vb tech EXPENSIVE
3 - security patch when you see this on your cpanel do it Right AWAY .... if you can't do your self well $100 extra to your tech lol )
4 - everytime you add a plug in or mod or add on : YES ITS true..... VB broken all the freaking time something new add to it.
pm me for more details
.
BTW i have a license of VB i do not use anymore if your interested with a PR2 domain name
Good Luck