I just got a hint about Sapphire's 4x4 AMD solution. Check out the BP-FT3GS board.
It's really nice, it has a AMD G-series processor and smaller than the NUC! But after a little research the lack of displayport is a disadvantage and I'm not sure what is the maximum resultion for HDMI output. The price is really friendly it's only 170USD, but I already bought my NUC so.. And btw it's looks like kind of same as the GizmoSphere's Gizmo 2.