He Luca, 2600 Watt ! you say.
I give you a tip what i did to find out what my rig uses:
1. look for tests on the web;
2. test you components and make a chart.
I did this with the usage of a Aquero and a lcd guige in the wall socket. I think you will be surpriced.
For example you fans "eaven if you use 200 fans the dont need 200 x 1,44 watt because you want to run them silent as posible". By testing them you will find out what you realy need.
Overcapacity is not bad when you are sponsored i think. But you make me smile with that figure "2600"watt.
4 x GPU "modern cards"use 250 watt eaven with 4 cards you have 1600 watt for the rest so that is verry much.
I dont say i am a expert on this it is just my feeling "i am just a FNG on watercooling".
Let me know if you do test.
Gr. from a rainy Holland
for this calculation (2600 W) I used a tests on the web, which takes into account a bit of OC, I had to approximate to fans and pumps N° (not provided so high in the test) and led strips,
anyway this is certainly is a calculation to excess, I was interested to know that definitely will not go beyond the 2600-2500, I will be probably always much lower.
I didn't want 2 Lepa G-1600 because they served, but only to exaggerate, you know me by now