Well, the choises for manuals is very slim. The factory, Haynes, Clymer and I've heard that Chiltons prints one. I like the factory manuals.
I have them from 74-80. I'm looking at getting manuals for the 70-73 and 81 and up. I also have the Clymer. I'm thinking I might get the Haynes, that way when some one says "My Haynes book says..." I can look in the Haynes book and see what they are talking about.
I also have a cd with manuals and parts books and a bunch of other stuff I can put in the computer and read.
Having a book in your hands just feels right.