Hi I run both boards vbulletin and IPS
I feel IPS is a quality product but I think vbulletin is less expensive with more features and free modes
I am finding that IPS just sells the basic forum board then you have to pay for the blog, then pay for ip content , then pay for the gallery, then pay for the downloads. In the long run IPS is way more expensive and hardly nothing is free
I thought I was getting the community forum but I found out later that was not the case
I like them both but I like vb better
I have 3 sites so I am looking to try a 3rd type of forum
Vbulletin has more mods which many are free
IPS has mods but most require a fee
Hope this helps