Hi Iris Elaine,
Yes … they do sell BE along with Pure Latex Bliss, Gold Bond, and Ecosense memory foam mattresses as far as I know. As you can see in post #6 here … I think highly of them as well.
Memory foam and latex are very different from each other but the choice of one over the other would be a preference choice. There is a little more about how they compare in post #2 here but the best way to decide which one you tend to prefer would be with your own personal testing.
If you are going to Northampton anyway … the other two manufacturers on the Springfield / Northampton list would probably be worth a visit as well.
Phoenix