recommendations for silent water cooled system

Hi everyone, I'm new to this subreddit.

tl;dr: I need recommendations for the most silent water cooled system for my pc.

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Over the years, I've built like 5 computers myself, the last one with an AIO liquid cooling kit. The AIO kit had a pump failure, and it didn't even meet half of the European legal warranty period (3 years). From that experience I've learned to never trust that type of AIO again, I don't care if they're top brand, never again.

Also, the fans on that AIO + the fans on my graphics card were making a horrible noise, at least according to my subjective criteria, when I played games, no matter how (un)demanding the games were, there are a lot of poorly optimized games. Don't you find it annoying to play or be next to a computer tower making a horrible sound? I do, a lot.

By the way, my current CPU is an Intel i9 13900k, and my GPU is an MSI Geforce RTX 4080 Trio X. Yes, I usually play very demanding games, and also very poorly optimized ones, in 4K and everything in extreme.

Because of what I wrote above, I have decided to make the definitive jump to custom liquid cooling. Not as a hobby, or even for aesthetics, simply to reduce noise and achieve good (or very good) temperatures.

I don't care if I only lower the processor temperature by 5 degrees Celsius compared to an AIO, but in exchange I ask that it be as quiet as possible, even under 100% load, both CPU and GPU. This is a red line for me. It is not negotiable. I am not going to spend 4000 euros (or dollars) on a computer to make a hellish noise under 100% load.

Therefore, I would like you to recommend a liquid cooling system that is as silent as possible. I can't put the computer in another room and put only the monitor, keyboard and other things in the room I live in, for noise reasons. I've thought about a MORA radiator, let's see if anyone can advise me. I'm not a millionaire, but I'm not going to complain about money either, as long as the price can be discussed in reasonable terms.

Thank you for reading this far, and have a good weekend.

Regards