I agree. The OWC drives apparently perform better than the stock Toshiba models, in addition to being offered at higher capacities.
Except it's a 1000$ upgrade. That more than doubles the price of the base 11".
I'd rather just get a NAS. It'll have about 6 TB in RAID5 for that same 1k$ and all my networked computers will be able to store stuff to it.