Very nice build! I had pretty similar setup to your initial setup with the two rads. I only have a 3700x and a 2080ti, so my cpu temps are probably much lower because of that. I initially had the clear tubes, but ended up changing it to the ZMT tubes, which seems to be lasting a lot longer. You seem to have your pump on fairly low, so I'm not sure changing it to the DDC310 would do much. Pumps has always bothered me, but I kind of just "lived" with the pump noise, even a D5 would bother me. Looking forward to your revisions!