i went with Casino for several reasons. 1) it was a GREAT book which i highly recommend 2) sharon stone's outfits 3) tour de force by pesci and de niro. This was the movie that made me scared to ever run into joe pesci in real life, whether or not he's just playing a character. But GoodFellas is a close second, if only due to ray liotta trying to avoid FBI helicopters and leaving his handicapped relative in charge of the clam sauce for the linguine is still his first priority.
Also I've never been to vegas so i liked the depiction of the inner workings of the casinos.