I don't know whether you're still interested to find out a good ezine or not (your post is quite old), but let me tell you that you'll never ever find a very appropriate answer for your needs asking such a question in forums.
As a matter of fact, maybe you already noticed it
More than 4 months ago I wrote an article dedicated to all advertisers, like you, who ask similar questions on forums:
If you're still interested in this topic and you're willing to spend 5-7 minutes, the article above may help you