I've decided to buy xenforo forum but I want to be able to integrate my website with xenforo as beautifully as i had done with my phpbb forum. with my phpbb forum I completely integrated my website and my chat room. That is there was only one registration page. Also I was able to fetch latest post from the database and show them on my userpage. I had customized almost everything with phpbb. The only thing I dislike about phpbb is its look and the "free" tag. People dont' take phpbb forum seriously. So I want to use xenforo as it's a cheaper alternative of vbulletin.