i have a QNAP nas, an intel based model and it is really nice, i don't need to install debian on it beacuse qnap's firmware is based on linux, it provides an option to install ipkg as a module and with this module you can install all you need to get a chroot with a full debian system. This way i have the heaven: qnap's firmware for management (NFS, streaming and via qpkg i get mldonkey, twonkymedia a torrent/http download station, dropbox and google drive integration, and a lot of goodies such a DDNS free setup to get FTP, web filemanager and so on) and debian choort for extras (apt-cacher-ng server mainly). Qnap hardware is much more expansive than others, after 3 years i have to say it deserves it all.