Hello everyone I currently own a 2009 iMac and attached to it always faithful external 3TB Lacie. Thunderbolt has always sounded amazing but I never looked too much into it and much less kept track of the advances. I recently ordered my nMP 6-Core stock (quite the leap) and therefore the storage is practically non existent. But storage isn't my biggest issue, 3TB are more than I can need for the foreseeable future, but my issue is speed. I edit video and work on some animations (FCP, AE and PS). Since everything but my apps will be stored externally, I need to be able to work without big delays, or it would be pointless to buy such a fast computer. I don't think I understand that much about raids but I think it would be overkill at this moment. Please, correct me if I'm wrong, but the main advantage of having a raid is having physically separate disks so there's always safe information in case one or more fails? I've been searching and I'm thinking about getting a LACIE d2 - 4 TB but I would like to know if anyone can tell me the differences between it and something like WD My Book Thunderbolt Duo 4 TB or LACIE 2big Thunderbolt Series 4 TB in case I am missing anything. Thank you!