So, I just ordered a Seagate GoFlex Thunderbolt adapter, OCZ Vertex 4 128GB drive, and El Gato Thunderbolt cable. I was going to go with the 256GB drive, but I will have an extra 1TB drive inside my iMac for data. Hopefully, it will work the way I want it to. Just wanted to share with y'all and I will report back with my performance evaluation. 