iTunes music purchases after changing country Are iTunes music purchases still available once I change the store country, assuming that both stores offer the same content which is associated with my account?

I am just concerned about making a substantial investment in music purchases now and not having the ability to download the files after crossing borders.
Your account has an associated country based on your credit card address. As long as you keep your account you should have access to the content, but I think you'll need to make a new account once you get a credit card in the new country. I don't know if you can have 2 accounts active in iTunes at the same time but I'm pretty sure you can switch between accounts.