Which are the most energy efficient freezers?

It seems like I always have a hard time fitting everything into my freezer, so I am thinking of getting a separate freezer. I don’t like the idea of using up a lot more energy though, so I am wondering if anyone can tell me which are the most energy efficient appliances available right now. I know that the Energy Star appliances are good, but which are the best? Is there somewhere I can go to find out how much more efficient the different options are compared to regular freezers? I want to make sure I get one that I will like as well.

Share and Enjoy: These icons link to social bookmarking sites where readers can share and discover new web pages.