Is a Synology NAS any good for hosting a vault? Aside from that, what is good mid price ranged hardware for hosting a start up vault with plans to grow to 10 TB in the next 2 years? Are there any known hardware brands/models that one should stay away from entirely?

I've heard good things about NetApp and BlueArc (high priced), Dell Compellent and Equallogic (mid-priced), and Nexenta (low priced)....