catfish: to compare to ztex, our dual FPGA boards are $560 each, or $280 per FPGA. His boards are $460 each with one FPGA. That's a big difference, eh?
It really just comes down to the design of the board that you prefer, though. I think all these boards look awesome, and it's great that people have some options, depending on their needs!
Well no it all comes down to MH/$. While you may have 2 FPGA you are getting what 240MH/s combined.
Ztek gets 190MH on a single FPGA.
Also he offers significant bulk pricing. I wish he had a 4x FPGA design though. Building a 10GH cluster with 50 boards is kinda repetitive. Anyone looking to buy FPGA is looking to buy big. Whoever make the highest capacity board w/ lowest price per MH will be the one who gets the lions share of the business.
Good luck to everyone. May the best capitalist win.