Round here 1st gen 2006 macpros go for $100-$150. Much cheaper than any 4 drive holding raid box. I was thinking about buying 6 of these to hold 24 3 tb hard drives and put the four drives in each one in raid 1. Any reason why this would be stupid other than space and weight which I don't care about? For $150 I get a cheaper raid box and free a mac pro and also I could run them all on my wireless network.