I'm going to get my cats declawed
Before you declaw your cat, please research and consider other options because it might be unnecessary and painful to your cats.
My cats are tearing my furniture.
Having a cat declawed is such a painful surgery that it is unethical to do so.  You should get your cats a scratching post instead.  They will prefer it to furniture.
I think declawing is fine since I don't like them anymore.
A painful surgery is not something that should be inflicted on an animal, even if you don't like it.  If you don't particularly care for these cats anymore, and if they are causing problems for you, it might be best just to give them to the shelter instead.  They will be able to find a new home and you can save the expense of declawing.