I am currently building a NAS for about 24 TB of storage. Video files, slow access, long term storage. No performance issues.
I am currently undecided between buying a JBOD case and installing OpenSolaris (because of ZFS), or purchasing a Nexenta license. The difference is about $ 12.500 for licenses over three years.
What would you see as the main advantage in purchasing a nexenta license, beside the support? Did nexenta really enhance the basic OpenSolaris, or is it just a lot of marketing speak? No one really wanted to answer that question.
P.S. With the nexenta license pricing I am even thinking of going with Windows Storage Server.