TB Enclosure
Better yet, get a TB RAID enclosure. Very fast and very easy to replace if you set up a RAID 1+0. Single drive failures can be easily corrected by replacing the failed drives. It is highly unlikely that you would ever have a total loss of data with a RAID 1+0 -- of course, you could be very unlucky and have two of the drives that mirror each other on the array fail at the same time.
The only drawback is initial cost, but otherwise, you could get something like a Pegasus R4, R6, or R8, have lots of redundancy, lots of space, and lots of speed.
I have a 1st gen R6 with six 2TB drives, and the data has survived two drive failures in the three years I have owned it. I have a 1.15TB and growing iPhoto library (with lots of AVCHD movies), and it is nice to be able to navigate through that library quickly.
SSD's would be nice to have, but with a RAID array, you can replicate SSD speeds at a much lower cost and greater reliability (vs. a single SSD drive)