We're getting there. Western Digital Green drives are up to 6TB now, which would give me ~18TB on my Synology.

Part of me doesn't want to go to the trouble, though. Part of me just wants to take all my DVDs to Walmart and convert them to Ultraviolet for $300 (I count roughly 150 DVDs in my collection). Then again, that's more than the cost of a 6TB drive, though it doesn't count the time it would take me to do all the ripping...