I used to worked in a e-learning business where we used MailChimp with about 80,000 subscribers on about 3 lists.

The price range for this size of list is too high in my opinion - speaking as one of your target customers. If I were to suggest using your service to my boss he would have laughed in my face. If I recall correctly we were spending about $400/month on MailChimp, so we'd need to spend 50% of the original service for Mailion?

Just some feedback, you might want to revisit pricing scheme.