Two Thumpers For Tommy?

After me banging on for a year about how cool ZFS is, my boss is finally convinced and wants to get a Thumper (or 2). Depending on budgetary constraints we may be getting a couple of these to implement a warm backup solution for our current data and about 5 years worth from now (they are 24Tb each)

48 Drives in a 4U rackmount for 20k, great value and unbeatable storage density.