developing a membership site

Hi, I would like to have a membership site developed. Basically there will be two types of subscribers. This is a membership coaching website. One would be free having access to free newsletters and blog and the other would be a paid subscription based service(Recurring billing/subscription)? which will include video, powerpoints and audio as well as written material and articles. I need easy browser based content management as well as integrated RSS feed. I would like to have survey and poll facilities as well. I need the site SEO friendly and that is the approach that I am looking for.. Thanks Jay