Am considering upgrading my 1070 in the very near future. I am gaming at 4K with a i7-4790K, 16 GB ram, everything is on a SSD. I generally have no problems but always disable some bells and whistles like bloom, DOF and some others. What is a good upgrade from the 1070 without spending an arm and a leg? Was interested in a 2070 but not quite willing to dish out 700 for a GPU.