any mobo that supports dual x8 sli would be good for you
for suggestions these are my 2
http://pcpartpicker.com/part/msi-motherboard-z87gd65gaming
http://pcpartpicker.com/part/asus-motherboard-maximusvihero
im partial to asus as there build quality and customer support is really good
if you want some a little less expensive try these out
http://pcpartpicker.com/part/asrock-motherboard-fatal1tyz87killer
http://pcpartpicker.com/part/asus-motherboard-z87a
http://pcpartpicker.com/part/gigabyte-motherboard-g1sniperz5s
http://pcpartpicker.com/part/msi-motherboard-z87g45gaming
if you want my opinion though its the hero