Neg rep to you. That was a horse racing movie and you posted it before me. FU but I have another one. Kelly's Heroes. 14,000 gold bars in a German bank. The last defending German tank does a 180 and blasts the fucking doors off for a cut of the loot. Not to mention the cast.
Howzabout "Thunderbolt and Lightfoot"? Or "The Wild Bunch"?
Another vote for "The Anderson Tapes" - I think this film should be better known than it is, as it features a solid lead by Sean Connery and was Christopher Walken's first film.
Heat
Reservoir Dogs
Kelly's Heroes
Kind of torn about Public Enemies too, it's good in its good parts but when it's bad it's bad.
And a few that probably don't really count as "heist" movies but are still good--True Romance, Inception (the "reverse heist"), L'instinct de mort and L'ennemi public No. 1.
Then there was the TV movie series called Banacek. 17 90-minute movies in the early 70s. Each one featured a clever "locked room mystery" type caper, that if you were sharp could be solved before it was exposed on the show.