batj,
Welcome to the forum!
You can request a brochure on the Heartland website, even download or view online, which may list the packages.
But, you may want to call Heartland Customer Service and ask for a Sundance brand rep, to find out what the packages include. We just saw a "new and improved" 2013 Sundance 5ver at the Dallas RV show. I was very impressed! They now have more color on the exterior (including a painted front cap), and a lot of nice features that appear to be upgrades throughout the interior.
What does this mean? Well, if you like the look of an early 2012 Sundance, you might get a good deal on an in-stock model. However, if you like the new features more, the new models are probably rolling off the assembly line now, and you can even order one to your liking.
Good luck in your search!
Erika