Just finished a review of the new Areca 8-drive RAID with Thunderbolt 2 over at Pro Video Coalition. I've been reviewing a lot of RAIDs lately due to my own transition over from a 2009 Mac Pro to the new Mac Pro with Thunderbolt. This is probably the last I'll be looking at for a while, but what makes the Areca unique is that it's 1) very, very fast when used with a Thunderbolt 2 connection, and 2) it's the only 8-bay Thunderbolt RAID I know that you can buy empty, and add your own drives to it. That let's you save considerably money if you have a bit of a do-it-yourself spirit.
You can read the full review right here.