I recently purchased a Pegasus RAID array form my iMac. I chose this device because it is billed as “the world’s first and fastest” Thunderbolt array. The speed tests above seem to bear this out. On the left is a speed test on the hard drives in my 4-year-old, $12,000 Mac Pro at work. On the right is the Pegasus running a four-disk RAID5 attached to my iMac. As you can see, the difference is impressive!