I have another suggestion which I just did. I bought the new Thermaltake Core X9 case which holds 3 480 rads inside and can actually hold more.
I have 2 XSPC RX480 v3 in the roof and an EK Coolstream 480 PE on the right side mounted on the bottom. I'm using 12 AP15 Gentle Typhoon fans controlled by a 6 channel NZXT fan controller (2 fans per channel).
My 5960X and 2 R9 290s loves the rad capacity. I'm using a EK Supremacy EVO cpu block and 2 EK R9 290 acetal/copper full blocks for the gpus.
I'm using an XSPC Twin D5 bay/res where the 2 D5s are running in series. Incredible cooling.
5960x-4.4 EK EVO SPR|AsusRE5|16g DDR4-2400|Gigabyte Aorus Extr GTX1080TI+WB|2 Smsng 850 EVO 500gb ssds|2Tb WD Blk|Win10-64|PC P&C 1200W|Thrmltake X9|3 XSPC RX480 rads+ 2 D5s| Acer ET430k
2700x-PBO-EK AM4 EVO |AsusC6H16g DDR4-3200 FlareX|Zotac GTX1080+EK WB|Corsair MP500-480gNVMe PCIe3|Win10-64|EVGA 850W|ThermaltakeV51|2 360 slim rads + EK D5 vario 140|Dell U3415W