My wife, Diane, and I are wondering about the Shantung Maple size. Howard's new book shows it to get 30' to 60' tall with a spread of 20' to 40'. But, all other references we have looked at say the tree gets 25' to 30' tall with an equal spread. Can any one explain this discrepancy? We are wanting to plant this tree, or a Lacy Oak. We would prefer the maple because the oak will have acorns, which can be messy. We are planning to plant for shade in our back yard and need it to stay around 25' to 30' in height and width.