Boiler Room
Boogie Nights - hurray for 70's pron
Run Lola Run - if you like techno... this is a must movie.
Doom Generation- this is a totally fucked movie, you been warned.
A Clockwork Orange - for me its mainstream, but way worth it.
Henry - Portrait of a Serial Killer   ( hard to find, its not very bloody, but it will scare the hell out of you when you meet strangers.)
Owning Mahoney - ( spelling? but its about a degenerate gambler, and how a casino helps his addiction, based on true story in Canada.)
Toxic Avenger - NJ's own superhero. theres like 19 movies -- great for parties.
Mean Creek - kids have to cover up a murder of their own, tragedy.
Woodsman - a pedo adjusting to life outside prison, mainstream actors.
Three o'clock High - fight in school
Nueve reinas  ( nine queens ) - its in spanish with sub-titles, about two con man scamming a stamp collector, it sounds boring, buts a great movie if you like conman. IMDB says it won a ton of nominations and stuff. I saw it on IFC.