This would be a good mobo with your requirements.
http://www.newegg.com/Product/Product.aspx?Item=N82E16813128863
I personally would wait around til black Friday or cyber Monday and see what kind of deals are circulating though, you might be able to land a better board for a better price
EDIT: I just realized you got a K CPU, are you planning on OC'ing it? If not, get a regular 6600 and go for the board I linked to you. If you are OC'ing it, go for the best deal on a z170 board on black friday or cyber monday. You're not gonna get a good z170 for $100.