I would go for the asus prime, the asrock taichi, or the gigabyte aorus 7. Not really a whole lot of options for X399 mobo's yet, I believe asus will be coming out with a strix x399 board soon that will sit between the prime and the zenith. They all have pretty comparable VRM's and other PCB features. I personally think the taichi or the aorus looks the best. I would be comfortable buying any of those 3 boards, there is nothing that really makes one stand out among the others.