I saw the aforementioned video on those about a week ago or so. Personally I'm not a big fan of RGB. The only RGB DIMMs that I ever thought were really good looking are the Trident Zs, but as I run Linux, there is no way (that I know of) to synchronize RGB system wide, and in some case you pay quite a premium for some lights. The only RGB component in my system right now is an Asus ROG/Strix Z370E motherboard, and I turned the lights off in BIOS. If I were going to build a showpiece system, my personal taste would run to getting some of CableMod's cables and AIO sleeving and installing UV LEDs.
EDIT: I am currently running Corsair Vengeance LPX DDR4 / 3000 MHz 15-17-17-35.