With third gen Ryzen there's isn't really any overclocking head room and with a non X varient the processor won't be binned in such a way where it will be able to achieve overclocks worth the time and effort in doing so (because they most likely wont be achievable). That being said, my recommendation is to install the Antec AIO and enable Precision Boost Overdrive 2, as that will automatically be able to push that CPU to it's limit and I doubt you'll be able to overclock much higher than that. The Antec Mercury RGB 240 would look great in that case so i'd totally understand you choosing that AIO over the 212 black edition after market cooler.That makes sense
Yes I can get Cooler Master RR-212S-20PC-R1 Hyper 212 RGB Black Edition CPU Air Cooler and for a nice price. I was just worried it would over take space on my board compared to the Antec Mercury RGB 240 Cooler which is also more quiet and can be placed on the front pannel to forget about, its price is double though. I'm finding it hard to decide which one is really the best for moderate OC regarding price/benefit.