ahhh @clement, I'm terrified by the thought of installing my own watercooling on $10K of parts. Also I have no idea of how to even make something that run well for 2 CPUs (and are you also suggesting the 4 GPUs?)
You are right that the link on one experience you showed on H100 sounds bad. But looking at the amazon rating of 4.5 starts on almost 3000 reviews gives me some confidence.
I could also consider the Enermax Liqtech 240, has one really good vidoe review here: https://www.youtube.com/watch?v=x3fWYb_8mRQ but then not enough amazon reviews to judge how good it could be.
Regarding reach for mounting all, I was thinking that the Core X9 case will have plenty of placement options on top, bottom, sides so I could find places that reach.
also if I go all water cool, what do I do about video cards? would I go with something like this? https://www.youtube.com/watch?v=MwQ4N8ogLl8
I don't know, I thought about it and it sounds tempting, but it seems too risky. I'm thinking going with this system, and if things don't reach to mounting places, or if it's too loud, I'll reconsider.