Here is a copy of one of my comments over in the "Monthly Newsletters" thread...
Grant, looks as if you're considering 2 good services. I love the 3 Bird Marketing user interface. Once of the best I've ever seen.
While you're doing your research, check out 1to1 News. Malinda is a frequent contributor here on DealerRefresh and offers a very personalized service. I have my dealers using her with great success. Matter of fact, my Mercedes dealer hit a 43% open rate last month. That's one solid open rate!
If you don't have a solid strategy around email marketing, you're missing out. A consumer focused newsletter fits nicely into this strategy.
Do yourself a favor and get your dealer into Remarketing. So as your newsletter is driving traffic back to your website, you can continue to offer a relevant message in the form of display marketing over the next several weeks.