For cultural reasons Americans simply don't seem to like cheeses that are not bagged, shredded and kept in the refrigerator. (American HNers might be surprised to find that a lot of cheeses are not meant to be kept in the refrigerator). Good cheese is like a living organism, it not something dead that needs to be kept cold. It has bacteria that lives on it and it alters and changes its taste. I believe you won't even be able to sell that in US simply because of local food safety laws -- cheeses have to be pasteurized to be sold here.
I don't think marketing a high quality cheese is going to be impossible in America, (well, maybe not Casu marzu, but I don't give a crap how good that is, I'm not eating it) you'd need to educate your customers and take steps in terms of packaging or co-products to help them use the product best.
(Note: there are exceptions to every rule.)
(Of course, if it can be sold cheaper by being made in America, that's a great selling point!)
I see that market as pretty occupied right now.
The United States already produces over twice the amount of cheese of any other country. It seems to me that you are not from Wisconsin and I would guess not from any of the states where cheese is big. Try going to a supermarket in Vermont or New York...the market for imported cheeses would be quite small.
I am not a cheese maker, I've merely read this on food blogs.
I mainly eat cheese from unpasteurized milk...