That's no fun at all. Why wait when we can experiment?
I am about to pull the trigger on a NAS, either a Synology 1010, QNAP 559, or a ReadyNAS Ultra 6. Most likely the Synology.
The only thing holding me back is the 3TB question. When I buy the NAS, I'll be getting at least one WD30EZRS to go with it. Step 1 will be to see if I can make it work, before ordering the rest of the drives.
I'd do it today, but I fixed one of the problems with my existing storage array that was driving me to upgrade, so that project has become slightly less urgent.