Fivercamper, I opted for the 3 3/4 inch brake option and don't feel the need for any more brake. They have served me well, even when I was pulling with a 3/4 ton truck (which was overloaded). Whether in the mountains, city with heavy traffic or dealing with inconsiderate drivers on the highway, I haven't had a problem where I felt I needed more brake. Just my opinion.
John