The best out there now are:
ASUS Crosshair V Formula (very best)
ASUS Sabertooth 990FX (very good)
ASRock 990FX Extreme9 (good)
GIGABYTE GA-990FXA-UD5 (good)
The ASUS Sabertooth 990FX GEN3/R2.0 is the only AMD motherboard with PCIe 3.0 x16, so if that's a feature you want, then it's the only option. I just completed a build using it and so far I haven't had any issues whatsoever.