Interesting about the river birch. It is often highly recommended as a desirable tree, even by the U of M and master gardeners locally. Good to hear your comments; I had just been thinking I should consider getting one. Or maybe not!
I bought a 'Twisty Baby' locust a couple of weeks ago because I thought it looked really cool, and actually planted it in one of my borders. Then I started reading about it online and it would up in the trash can...I made a bad choice, but at least I didn't wait to experience the consequences for once.