Two things:
Working in the Detroit Area would not include Windsor. Just wanted to make sure of that.
I'd do the dual degree out of pure interest in comparative law, but i'm skeptical that (and i will get flak for this) someone who has a real interest in law beyond just earnign money as a lawyer, will have all their academic interests fulfilled at windsor/DM.
BTW, I got the nice package from DM. that's it.