I think you mean Exotic Shorthaired cats with the flat faced right?
As far as allergies go, you are not allergic to the fur, it is an ingredient the dander you are allergic to. Persians and Himalayans (look like exotics but with long hair and flat faces) are supposedly great for people with allergies. They don't have what causes allergic reactions in their dander, theirs is different. It is a protein or something in the dander, all cats have dander but some don't have this allergy protein. I don't know if that is the correct word or not. Anyways, hair doesn't make a difference, just the protein in the dander.
Plus, long hair cats and short haired cats shed in completely different ways. The Persians and Himalayans as I mentioned above, shed in little clumps of fur throughout your home whereas short haird cats shed everywhere and fur often goes flying when you pet them.
SO I would suggest getting a Persian or Himalayan cat if your husband has an allergy problem. My father was severly allergic to cats but when I found out that it isn't the fur, but the protein in the dander that is what causes the allergic reaction, we got a Himalayan and he had absolutely no reaction. He used to stop in at someones home who had a cat and get a reaction and now he is fine with the long-haird Himalayan.
I hope that makes sense, I just don't know if I have the correct terminology.