Hi,

Going back 2 years when i was evaluating our options, Fibre Channel targets under OpenFiler seemed experimental, where Open-E DSS v6 was very simple to configure and worked.

Although Open-E still don't provide no HA for FC lun's and no multipathing options our direct attached storage.

NexentaStor Community Edition should be in your product considerations also.
It's NAS/iSCSI limit of 12TB of Used Storage so you can attach more.
As a free iSCSI server it's rock solid.