I just saw on aria that the GTX 780 Is about the same price as the AMD R9 290

Which should i get?
Gonna be using for gaming mostly and usual school work

Also if you for some reason couldnt click the links on the 2 Card names here they are:
GTX 780: https://www.ari*****.uk/Products/Compo...roductId=56419
AMD R9 290: https://www.ari*****.uk/Products/Compo...roductId=59456