What are the best English-speaking Christian Internet forums?

I’m not sure which one to try out. There are just so many, for example www.christianforums.com or www.christianforums.net or www.christianforumsite.com/forum. A Google search offers dozens of options.

Anyone on Fluther with personal experience in any of them?

A healthy mix of conservatives and liberals would be good, but I want to avoid forums with a majority of ultra-conservative religious nutcases. Another aspect I’m interested in is interfaith dialog, i.e. forums with users of other religions as well.