Hmm, new to you, eh? Hard to know what you've seen, but I'm guessing classics like Double Indemnity, Sunset Boulevard, The Maltese Falcon, Laura, Gilda, The Big Sleep, The Asphalt Jungle are out then, eh? Actually, I'm prolly gonna list classics you've already seen, but here are some of my favs:
The Night of the Hunter
The Third Man
Odd Man Out
Lady From Shanghai
Out of the Past
On Dangerous Ground
The Woman in the Window
Quai des Orfèvres
Crimson Kimono
Scarlet Street
In a Lonely Place
Touch of Evil
Force of Evil
Le Deuxieme Souffle
The Third Man
The Big Heat
Kiss Me Deadly
The Reckless Moment
Nightmare Alley
Kansas City Confidential
The Hitch-Hiker
Where the Sidewalk Ends
Pickup on South Street
The Prowler
Gun Crazy
Night and the City
Detour
The Stranger
damn--SO many more! and don't get me started on neo-noirs!