I agree ROI calculations are useless which is why I always precede with 'ROI at today's market would be...'

Currently the most profitable algorithm on BCU makes $11 per day:
http://zetheron.com/index.php/fpga-performance-profit/

CVP-13 won't cannibalize much because most CVP owners will mine RB3 which isn't available on any other card.

I will post photos of the bridgelink X1 once I have permission to.  Unlike other sketchy companies bridgelink wants their card fully tested and ready to order before being officially announced.  I helped in the design to eliminate unnecessary components and keep price as low as possible, and the result has been good.