Which serviceberry is best suited for my yard and where would I find it?

Question: I would like to plant a serviceberry shrub/tree in my yard. Which serviceberry is best suited for pruning as a tree and where would I find it? Maine Audubon sells Amelanchier canadensis but none of the other varieties. Would this work as a small tree or are there local nurseries that would have other read more Which serviceberry is best suited for my yard and where would I find it?