Nothing to stop you from buying a 6g unit and swapping it for two 25's yourself.

Except breaking my warranty.

Hey Rob -- How about a plan where "we send the drives we want installed and the unit and service does the install for us so we don't void the warranty?".. charge a fee for it obviously, but what do you think? Solves the "I can't get big IBM drives direct" problem for those of us who CAN get the drives... Also allows upgrades down the road for "consumers" without breaking the warranty.