Two things jumped out at me. First you want a quad channel memory kit. 2, dual channel kits is a bad idea and can result in memory mismatch performance and even blue screen issues.
The 2nd. The 8GB RX 480 AMD is going to cost $229.99 not 199.99. The 199.99 model only has 4GB of VRAM. I recommend the 8GB Graphics Cards.