Paprika is out on both Blu Ray and regular DVD here in the USA but I watched it subtitled so couldn't tell you about the dub. The special features are pretty interesting on the dvd too. I did find this list of features for the Blu Ray disc on the animeondvd website -
* Japanese 5.1 TrueHD Language
* English 5.1 TrueHD Language
* Chinese (Cantonese) 5.1 Language
* Chinese (Mandarin -Taiwan) 5.1 Language
* French (Parisian) 5.1 Language
* Portuguese (Brazil) 5.1 Language
* Spanish (Latin Am) 5.1 Language
* Thai 5.1 Language
* English Subtitles
* Tsutsui and Kon's Paprika: A behind-the-scenes look at the making of Paprika with novelist Yasutaka Tsutsui and director Satoshi Kon
* A Conversation about The Dream: Director Satoshi Kon novelist Yasutaka Tsutsui and voice actors Megumi Hayashibara and Toru Furuya talk about production of Paprika
* The Art of Fantasy: A look at the art direction with Art Director Nobutaka Ike
* The Dream CG World; A look at the cinematography and computer-generated world of Paprika with cinematographer Michiya Kato
As for Superbad, I know a guy we've now nicknamed "McLovin" because he acts so much like the kid in the movie.