Don't know about Alternatives really...in all honesty I love my DNS-323's.
They are currently acting as my media server and a backup server for the media server, and currently they have done most of what I have asked of them with no modding required.
In a few months will be getting another 2, basically going to have 2 data drives and 2 backups, so my hope is my 2 new ones will act as my primary nas and my 2 dns-323 will sit in the background as a backup device when required.
Synology stuff intrigues me however comes off as a little too expensive, personally going to wait for this 325 to come out and see what the reviews are like before I make any hard decisions.
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