Facebook Page experts and strategists, need help

I will try and make this as least confusing as possible. I am new to offering clients FB pages.

Said so many times before, clients don't care about websites (facebook pages) they care about leads (customers).

I understand incentivizing the "like" button on a clients FB page, so they pick up another like as well as get a potential customer. "Click like and get a free foot rub"

The public visitor now gets sent to the "fan" content page and they get their free foot rub.

Next time the same visitor visits the clients FB page they are defaulted to the wall (as I understand it). I messed with accounts to figure out what happens.

A public visitor defaults to the clients customized public FB page, after a like, they move to the "fan" content page, after that subsequent visits they keep landing on the FB wall of the page.

Is there a way to default fans to a 3rd page or back to the public page or 2nd page/fan page?

I figure it would be tough to get them to opt in via aweber and hit like ALL on the public FB page, but I can't figure out how to have them land on a customized page after they are fans and have already viewed the 2nd page/the fan page. Is there a way to do this?

Or if not, is there a strategy I am missing here where I can get a visitor to "like" and get their email address for follow-ups?

Any advice would be greatly appreciated. Thanks in advance.