I just bought the latest 5k iMac. For a drive that I will be connecting to it, I was looking at the Promise Pegasus3 R6 (Thunderbolt 3) but found the Promise Pegasus2 R6 (Thunderbolt 2) for about $1000 less. Would I see any advantage from a Thunderbolt 3 version than the Thunderbolt 2 version? Isn’t the limit the drive speed, not Thunderbolt? I read that 5k monitors need Thunderbolt 3 speeds, but this doesn’t apply here since the iMac is both computer and monitor… this would only in matter if I wanted connect an external 5k monitor to the Pegasus, correct? Thanks!