I'm running 24 2TB WD Black Drive, 64GB Ram, Dual Xeon E5-2620, LSI 9207 HBA, and 1 Intel 400GB PCI Card. I use a Intel 10GB 520 Nic with iscsi out to my vms. It honestly works so good.
We started using symantec dedup on our other san and it's working incredibly well with the ssd. I have a 90% hit ratio on L2 and 87% on L1 for that san. pretty happy!