I really like Casino. For whatever reason, I'm not a person who watches movies time and again, but I will watch this whenever it is on or wherever it is in the movie. I love both this and Goodfellas for their use of music to place the scenes. Scorcese does this so well.
Never saw Raging Bull, so I cant comment on it.
Edit: my two favorite parts are Nicky and his brother getting their just desserts and when Ginger goes bye bye.
Peace
Lounatik