I had worked in social work for a number of years with a degree in psychology. I would go with the social worker degree I think. I agree that it would be more broad and give you more options upon completion. I know that at least given the economy in the states, having job options is a big deal. My bet would be that they both pay about the same.

What an exciting time for you. I am sure that you will be happy with whichever decision you make.