Any reason why you want to use this block + pump combo?
You said you will be using in a normal ATX case
So I don't see a need for you to use this. Most people who use this block + pump combo are those people who have limited space inside their casing

To answer your question, Barrow products are fine. I'm using their reservoir, pump & distro plates
Waterblock, radiator & fittings from Bykski
Coolant from EKWB