The Score stars three male actors, Marlon Brando, Robert DeNiro and Edward Norton. A case could be made that these three are the best male actors of their respective generations. Probably Brando and DeNiro have this hands down, though it is too early to make the call on Edward Norton.
And they are good, but what makes this a gem is the plot and the direction. There is no sex and very little violence in this movie, and yet it has you on the edge of your seat from beginning to end. The last movie to do that (for me) was The Insider. Frank Oz's direction brings out characters you get engrossed in and a plot that relies as much on psychological tension as literal danger.
Quite frankly, this is the best movie I have seen this year (so far).