Haven't had any experience with the Ryzen CPU's, but I've built several Intel machines for friends over the past few years, and they're rock-solid. That ASUS supports 2 M.2 SSD's (There's another slot in the lower-right under a heat spreader), so I would swap out the two WD 1TB drives for a 2TB M.2 drive. That would also cut down on some of the cable management. Also, bear in mind that 9600KF doesn't have onboard video capabilities. If you want to stick with onboard graphics on the motherboard, you'll need a CPU that has onboard video built in. A step up, and a good bang-for-the-buck CPU would be an i7 9700K.
Another suggestion would be to swap out the Noctua cooler with the Scythe Mugen5. It's super quiet, and very easy to install, for half the price of the Noctua. The radiator is offset to one side too, to get out of the way of the RAM.