Crunchbang / Debian apt-preferences

Question

Então eu consegui configurar o apt-preferences, mas não tenho certeza se fiz isso corretamente. Então basicamente o que eu quero é, se eu tiver a necessidade eu quero instalar pacotes de TESTE, INSTAVEL e DEB-MULTIMEDIA e que (APENAS) estes Pacotes também recebem atualizações do Repo específico. Mas como uma "base" eu quero ter o STABLE-Version. Seria bom se alguém pudesse verificar se eu configurei corretamente, porque não tenho certeza de como funciona o Pin-Priority ...

então isso é meu sources.list

## CRUNCHBANG
## Compatible with Debian Wheezy, but use at your own risk.
deb http://packages.crunchbang.org/waldorf waldorf main
#deb-src http://packages.crunchbang.org/waldorf waldorf main

## DEBIAN-STABLE
deb http://ftp.cz.debian.org/debian stable main contrib non-free
#deb-src http://http.debian.net/debian wheezy main contrib non-free

## DEBIAN-BACKPORTS
deb http://http.debian.net/debian wheezy-backports main contrib non-free

## DEBIAN-TESTING
deb http://ftp.cz.debian.org/debian testing main contrib non-free

## DEBIAN-UNSTABLE
deb http://ftp.cz.debian.org/debian unstable main contrib non-free

## DEBIAN MULTIMEDIA
#deb http://www.deb-multimedia.org wheezy main non-free

## DEBIAN SECURITY
deb http://security.debian.org/ wheezy/updates main contrib
#deb-src http://security.debian.org/ wheezy/updates main

e meu apt / preferences

Package: *
Pin: release a=waldorf
Pin-Priority: 1001

Package: *
Pin: release a=stable
Pin-Priority: 800

Package: *
Pin: release a=wheezy-backports
Pin-Priority: 650

Package: *
Pin: release a=testing
Pin-Priority: 400

Package: *
Pin: release a=unstable
Pin-Priority: 90

Package: *
Pin: origin *.deb-multimedia.org
Pin-Priority: 10