Ok, on the long run its a better deal than Buying 2 mining rigs with R9 280x or HD 7590s. The GPU rigs will start giving profit sooner though then after about a month Big Bit will catch up. So its arguable. Considering size though and power consumption I guess bit wins... but only on the long run measured at least 6 months or longer. I think the best deal of all would be to add 1500$ and just buy cointerra for May batch.