since it is a server--not a desktop, there is less need for the odd linux app. For that reason, I bought a used Ultra 40 for $200, and run Solaris 11. Its fast, rock solid, and free. My current uptime is over 9 months. The only negative with Solaris is the lack of every last odd linux app. The only negative with ZFS in a home environment is inability to grow the number devices in a RAID Z.