Thanks both for your replies. This is reassuring enough, I will go with the Xoh as I originally planned. I have Grid powered with Ansible and no noise issues luckily. And Ooots was an alternative that I had in mind. I like Hyrlo as mixer and Ferry to send the mix to an external reverb unit and back. I could pair them with Xoh eventually.
My friend has many years of experience with eurorack, I believe he started with a pure Doepfer system before 2010. But now he has a lot of diy modules mixed in between and is constantly changing modules so the noise could be anything. I believe his advice comes from his unconditional love for the wmd output, only thing he hasn’t swapped.