MyBB is the best - I have used PhPP, and Invision. Yet MyBB gives administrators the most control over there forum. And allows the easiest interface for forum users. They also have more advanced features than VBullitien. And best of all they have an awsome customer support team, and its all free!
mychristianforum.createmybb.com
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mychristianforum.createmybb.com
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