You might get some answers on the tree forum
or on the container gardening forum.
Go to the top of the page and click on 'garden forums'

I'm waiting for the newly discovered Wollemi Pines to be marketed in the US. They're supposed to do well in many light conditions and would certainly be a major conversation piece. But, as I understand it, they won't be available in the US til late this year. And might be sort of pricy.