I agree with my fellow forum buddies. This site is extremely worthwhile and helpful. I would rather pay an annual fee as well simply due to the hassle factor.
I say this without hesitation because I've been using and benefitting from the site for several months. I'd hate to see the site turn to "pay only" as it might discourage visitors from spending time here. I'd like to think that you could move to an "honor system", where people who get value pay an annual fee...at least you could start there. That way, you won't lose the visitors...