I am in the market for my first ever NAS. I have been looking at the usual suspects like Synology and QNAP, but good ones do not come cheap. Recently I saw a IBM NAS on trademe: it has a server grade intel CPU, 8GB RAM and 12 x 1TB drives and runs FreeNAS. Although the model number is not on the listing, it appears to be a Xyratex unit. Specification wise it seems too good to be true. So apart from the noise issue (which will not be a problem for me where I intend to put it), what is the catch?
In general, for the same money, is it better to buy a new but lower spec model (say a Synology 216se), or is it better to buy an older but higher spec model second hand?
Use case will be mainly storage / back up and would be a bonus if I can run plex and serve iTunes from it.

