Depends what color scheme you're looking for.
Some of the best value boards which reside in the $150 range and under are the Gigabyte Z170 UD3, the Asus Z170-A and the Gigabyte Z170X Gaming 3.
If you want a top end motherboard for say a 6700k, the Maximus VIII Hero is also a good board for $200.
What is your entire planned PC budget?