Best Way to Implement Membership Site

[Hammer107]

Hello,

I am building a membership site that will use wordpress and vbulletin. I would like the wordpress site to be open to public and the forum available to paying members.

I only plan to have one tier....paid or unpaid....but inside the paid groups I would like to restrict forum access based either on time or the ability to pass a test allowing them to go to the next level.

What is the best way to implement a membership site with VB that is full featured, meaning handles signups, payments, status updates etc all automatically. Is there a vbulletin mod or script that is designed to integrate with vbulletin that is preferred versus others?

Thanks for any input.