Greetings! I've been having trouble finding a good solution so I figured I would ask the public for their advice. I have two SATA3 (6 Gbit/s) drives that I want to RAID. I own a 2012 MacBook Pro and a 2009 24" iMac. In the future I plan on buying a Mac Mini that would primarily it plugged into. Anyways, I've looked at the following: OWC Mercury Elite + Thunderbolt Bundle NewerTech Guardian The benefit of the Mercury + Thunderbolt bundle is that it supports the newer SATA 3 drives and can take advantage of the 6Gbit/s, but then I'm only limited to using this array with my MacBook Pro, and my iMac would be out of luck. So I looked for something that would have USB 3.0 (Speeds close to Thunderbolt) and FW800 for iMac hookup. The NewerTech Guardian meets those specs but it uses SATA 2 controllers so my drives would be limited to the 3Gbit/s. Would I notice the difference if I'm mainly going to be using it to transfer and store movies? Playback would be done off the external. I would also be doing some editing off the external but not often. What other options out there am I missing?