Thanks Erlftex,
I have been considering using my mother's U.S. address to get a U.S. based card, but as I have nearly 200,000 MR points, I would like to transfer my IDC to a U.S. based card, not just start over. Also, since I have a Centurion invitation on my IDC now, I'm wondering if I should take it and then try to get it transferred. I doubt I would get a Centurion invitation too quickly on a new account.
I don't generally have an exchange rate problem because I primarily use the Int'l dollar card for dollar purchases only (except when paying for my air ticket).
I have both VISA and MC with U.S. banks (dollar-based) as backups, just prefer to us the AmEx whenever it's accepted because of MR.
Susan