Looking for best theme to make coupon, discount, promo site

It would be good to include bookflip plugin/option for promotional newsletters. Any propositions or advices how to manage with it?

Depending on the site you want to build, checkout the Kupon theme for a site more similar to Groupon (where you add a lot of info/picturers on the individual deal pages):

Or the DeCoup theme if you want it to work a bit more like RetailMeNot (main a collection of discount links and codes):