I need to buy a new enclosure for media storage and a scratch drive for Photoshop, and so forth. I've been thinking about this one: http://eshop.macsales.com/item/Other World Computing/MEFW924AL2OB/ I don't actually need so much storage, but this enclosure is not very much more expensive than a single drive enclosure. Would I be able to install just one hard-drive into this, and have the second one as a future option? Or would it be worth it to install two smaller disks and put them into a RAID 0 configuration. I guess I should ask for advice about HDs as well. Which brand, where to get them, etc. Thanks!