I have found ZFS to be very good for my uses. I do intend to put together a system that will have lots of disks and then use Gigabit Ethernet to serve up iSCSI

I have found ZFS to be very good for my uses. I do intend to put together a system that will have lots of disks and then use Gigabit Ethernet to serve up iSCSI (CentOS etc. support it out of the box), which you can set up with a few ZFS commands. (Have not done this yet however)