Well, what are you currently using now for a cooler? In general, AiO liquid coolers don't perform as well as heatsink/air coolers in the value segment. Also, you'd still be dealing with 2 fans and now a pump for noise instead of just 2 fans(most likely) for cooling, so might not be any quieter.
Your noctua NH-D14 is about the quietest and best cpu cooler out there.
They come with low noise adapters that will make the fans inaudible. Use them.
How do they look? Better examine my cooler gear more in depth. PS. Oh, you mean they are quiet to begin with Well, yeah - I guess I'm just being greedy