I don't know about the others, but I am in it for the fun of developing a board. The board you linked may be a very good start to get FPGA developers to write code, but once our board is go, it won't be cost effective (unless you figure their support and warranty are worth the price). I am not arguing against the board: it is good for early adopters, but eventually we should beat it.
I agree 100%, that's exactly why I posted this, perhaps not being too clear about it. I treat this as a reference point, perhaps to learn from the design also.
I might get the board just to get a start with FPGA's, but otherwise it is reassuring that we seem to be on the right track complexity and price-wise.