nvidia mining rig

[grchina]

Ok guys i need help about chosing what card to get from this 3,i plan to mine whatever is most profitable
https://www.asus.com/rs/Graphics-Cards/ROG-STRIX-GTX1070-O8G-GAMING/specifications/
http://www.gigabyte.com/Graphics-Card/GV-N1080G1-GAMING-8GD#sp
https://www.msi.com/Graphics-card/GeForce-GTX-1080-ARMOR-8G-OC.html#hero-overview
prices
533 eur
589,00 €
556 eur
was leaning for gigabyte,other components are evga g3 1000w asrock pro btc h81,120gb ssd and 4gb ddr3 ram 1333hz