Those GPU temps are wicked but, liquid cooling concerns me. Had more than a few parts fried due to leaky AIOs, it's been many years since I've tried however. If I were to do it, similar to you, I'd go all out. Near silent build is hyper appealing to me. Despite all the improvements, AMD stuff still gets hot when you push it. The cooler than comes with the 2600 is loud. The Sapphire is loud. But in normal ops its enough. Not sure what options would even be available for the 5700...