I can personally recommend the Infrant ReadyNAS NV+ NAS. It is an excellent, enterprise class NAS and also has a lot of support for media streaming. It support CIFS (windows), NFS, AFP, Webdav and ftp. It also supports iTunes streaming, uPnP and a bunch of other media streaming protocols. It has a wide variety of raid options, including a proprietary type which allows you to grow the volume size over time without loosing data as higher capacity drives become available (important to us people who work with big media files or who have a lot of computers to snapshot backup). The NV+ comes with some pretty good backup software for backing up PCs and the NAS itself can be backed up to an external USB HDD, to another ReadyNAS or can use rsync to sync the data to an offsite backup solution. It also can act as a print server. Highly, highly recommended. Unfortunately, since being purchased by Netgear, you can no longer buy the units bare and they seem to charge 2-2.5x market pricing for their drives. If you really want to load it out, the best way is still to buy it with a single low capacity drive and then swap in 4 higher capacity drives purchased aftermarket. The beta firmware available will support the new Hitachi 1 TB hdd's too.