Can't make up my mind between an American Bulldog and a Doberman Pinscher?

I know all about the Doberman, however I don't know much about the American Bulldog, still it catches my attention alot. I don't know which one I should get. (I do know that the Doberman will be more beneficial being that it is the 2nd most protective dog breed and the most obedient as well as the 5th most intelligent breed...