The reality is that no matter what litter you buy, eventually your husband will associate its smell with "cat box" and have the same reaction to it he's having now. I know this because it happens to me. :) I associate the smell of baking soda with the cat box now.
Best thing for it is to move the box somewhere your husband doesn't go.
Like Prism99 we use a Litter Locker, which helps a lot. Redkimba and AnnThreeCats, I'm glad to see a review on World's Best Cat Litter - I've been wanting to try it!