What membership script is suitable for my product?

Hi,

I am going to create a membership site that offers monthly downloadable products.

It will be listed on Clickbank and hence has to integrate with it.

Hope you guys can give me some good advice as to which script can help me get there.

Here's some requirements:

1. I am using ClickBank as my payment processor.

2. Site is a monthly membership site which charges user monthly.

3. Site has affiliate program and is run by Clickbank.

4. Integrates with Aweber so that I can follow up and broadcast my messages to my buyers or visitors to my membership site (I will offer a free report in exchange for optin)

Process works like this:

1. Visitor comes to my sales page. He/she buys and goes through Clickbank's standard payment process.

2. Once transaction is completed, the name and email address is captured by AWeber.

3. Script goes to work and shows the "Thank You" page to customer. It also automatically generates a login password.

This is where the customer's email address is used as default userid for membership site.

So, in short, the "Thank You" page is essentially a page that displays the login details as well as the members' area login url.

4. Script also sends an email to customer with the login details and members' area login url.

5. Within the membership area, they will be able to download the current month's products.

The previous month's products are locked if this customer joined this month. To unlock, he or she has to pay a fee.

In other words, if you join the site in May, you can download all products from May to present time.

Billing is settled by Clickbank, inclusive of payment to affiliates.

Any advice? or alternative suggestions.

Davion