I've been extremely happy with the performance of the ES.2 SAS 3TB drives. Running two of them in a zfs mirror-0 config (Solaris 11 Express, attached to LSI 9211-4i storage controller via direct passthrough on VMware ESXi)
They serve, among others, as a datastore for Windows/Linux 64 bit vms.
I will run some dd and Bonnie++ benchmarks when I get the chance.
Edit: Bonnie++ 1.03 and dd benchmark results attached.