Therefore, I am extremely encouraged also by learning that Jim Buchanan has high regard of Rawls' work.
According to this blog entry:
Buchanan also spoke highly about Rawls. I think I mentioned that Hayek had said that his approach was similar to Rawls. I think Buchanan said he did not think that comment was surprising. I also believe I remember Buchanan saying that he thought more highly of Rawls than of Nozick.