Wyred 4 sound vs Audio gd dacs

It does not seem that a lot of people on audiogon have discussed the Audio GD dacs. They get a lot of respect on the Headfi sites. I am interested in them because they have the same Sabre32 ES9018 DAC chip as the wyred dacs and the Eastern electric minimax dac. Has anybody directly compared these to the W4S? Specifically the NFB-1 NFB-7 & NFB-8 look pretty good and comparable.

http://www.audio-gd.com/Pro/DACsEN.htm