Well if OP doesn't feel inclined to overclock, may as well go for a Ryzen 1600x, or Intel Kabylake. If they're willing to overclock the CPU, what's stopping the, from overclocking the ram. It follows the same principles, as they're no guarentees in speeds. Also, never did I say it's necessary to overclock the ram, it's just a option to for increased performance if needed, while saving $50.
If you want to spend $50 for possibly a 10% framerate uplift in the games and times where the CPU is the limiting factor, go for the higher clocked ram. Otherwise, the lower clocked ram, overclocked if needed will do fine.
Also, op, what refresh rate do you intend to game at? If it's 75hz or below, ram speeds won't even matter as a Ryzen 1600 can pretty much perform up to that refresh rate no matter the ram.