Again, I’m not really a fan of Constant Contact but it’s light-years above PatronMail. Personally I’m a huge fan of Mailchimp and Campaign Monitor but Bronto and Mailer Mailer are also very nice. All four of those support very advanced users and are created for companies who are really serious about creating great campaigns. They aren’t very template based becuase they assume that you will want to create unique mailers instead of adding information to a template. I think this leads to much better results but you do need to be a pretty advanced user.