How should I deliver this content?

I'm planning to launch a site that I've believed all this time would be a membership site. But, I think I might be going the wrong direction.

I've outsourced the process of securing lists of information and my target market really wants these lists spoon-fed to them.

The plan was to create 3 levels of membership.

Platinum - $$$ - All available lists are released to platinum members as soon as we receive them.

Gold - $$ - All available lists are delivered on a bit of a delay (2-3 days after they are released to the Platinum members)

Silver - Free - Lists are delivered 7 days after we receive them (and only 1 list per day)

The information is obviously time sensitive to some degree.

I think this is the definition of content dripping.

I've been brainstorming other ways to release this information, but I just can't figure it out.

I thought about just using ONE price point and all members get the same information at the same time - but I'm not crazy about that idea anymore.

Questions:

- Is there any way to distribute in this fashion WITHOUT using an obvious WordPress membership plugin setup?

- What about just using a simple web store, shopping cart with a mailing list so that I can email the lists directly to the subscribers (rather than having a website they must login to in order to download files)?

- If you think a membership site is the way to go should I use: Wishlist? Digital Access Pass? Others?

Again, the information is something people want - not super sexy, but time sensitive and helpful to someone who sees the value in not having to find it themselves.

I want to make sure that my delivery is seamless and uncomplicated both to the customer on from my end of the delivery.

Thanks for any input!