That's a tough question. It's very subjective but we should be able to help you find one which suits your husband's needs very well. A handmade knife as suggested is a great idea but it's a good idea to understand what you are looking for. Some more information from you will help. If you can tell us this it will help a lot:
- what is your price range?
- what will your husband be skinning?
- does your husband like big knives or small ones or both?
- do you think your husband will look after his knife or do we need something that requires very little looking after? (eg stainless steel vs non-stainless steel )
- do you think this knife will only be used for skinning or will he use it for other things, like dispatching an animal, meat processing or woodwork?
- do you know if he would prefer a modern look or traditional?
- what does he currently use and what does he/doesn't he like about it? This gives us an idea of his preferences.
- do you know what he uses to sharpen his knives? Some sharpeners aren't effective with some steels.
Any information you can give will help us to point you in the right direction and hopefully help you too

I have no doubt that plenty more people will respond to help out
(Edit: I just saw that some of these questions have been answered while I was typing this

)