That 'Wada's Memory' is lovely. Most around here most are those stiffer "normal" ×soulangeana. I like the Magnolia stellata very much for a similar loose elegance; a couple of pink ones grow on my street. My little house for house-bats sadly doesn't have any bats; apparently they need an expanse of water nearby when choosing house sites (I'd have to tear up the road to achieve that for them). Another nice thing to plan for is Carpinus caroliniana where one can look down on it in the autumn, because the colour is all in the upper surface of the leaves.