I'm a stickler for proper cables, both power and signal cables.
The power in, and signal cables I use coming out of my pedalboard, are all heavy duty, tech flex wrapped with heat shrink reinforcement.
All amps and recording gear in my studio equipped with IEC power inlets are given Music Cord power cables, but they'd be impractical with a pedalboard, due to their stiffness, weight and cost, so I use 14 ga. tech flex wrapped power cords with it.
One significant advantage the Music Cord cables offer is that they're shielded, so adjacent audio cables don't pick up AC interference.
You might be aware of this, but Schmidt offers several choices on their I/O patch bay boxes, including locking XLR, MIDI, etc, by Neutrik. However, I just use the 1/4" connectors that come on their basic box. I don't need locking connectors in my own studio. If I played out with the gear much, different story.
So far, having tried several different power sources for the board, including Strymon's Zuma, and a custom made solution, I found that the transformer-equipped voodoo labs power supplies work best with my gear and cause the fewest problems.
I have zero noise from my board.
Zero. It's dead quiet.
I can have all of my amps on, and the pedalboard switched between them, and none have noise. My amps are all dead silent, too, and they're all tube amps. High quality modern gear should not make noise. If it does, it gets returned to the vendor. Noisy pedals are not an option, either. I use NOS tubes, the modern ones pick up more noise, and generate more rattles, ringing and microphonics.
I can't deliver national ad tracks with noise. Everything is required to be perfect.
In the recording gear and mix area, I use a 2kVA isolation transformer with a balanced power supply that works like a humbucking pickup to cancel AC noise. There are no hums, no buzzes, no issues. Just complete inky black, quiet background. It makes my life easier. Mine is made by Equi=Tech.
The guitar amps and pedalboard are isolated from the recording gear, and are powered with a Furman PF1800 PFR with a 45 Amp power reservoir that delivers more power, faster, to the amps when transients require more instantaneous power draw than a wall plug can deliver. It makes an easily-heard difference, as do the power cables. Sounds like voodoo, but isn't. It works.
My microphone cables are the German-made Sommer EGB1 reference cables that use special Neutrik connectors that were designed for them. Yes, there's an audible difference, and they reject noise extremely well. I find that their low capacitance helps the mics, especially the dynamic mics. Unfortunately, they're costly. But WTF.
These go into BAE 1073 and ISA One mic preamps; I don't use the mic pres that came on my UA Apollo interface, and find the UA software emulations of hardware preamps not as good as the actual hardware, though it's OK when I'm in a pinch and need more inputs. All cables are dressed to avoid noise and electrical interference, and I never experience any. So the mics are quiet, too.
All the amps are miked up, the only thing I'd use a load box or plugin for is scratch pad work. I want to pick up the sound of the room, so I place the mics farther back than most do, and use a room mic in addition to the near-field mics.
The recording and mix areas are treated with Real Traps bass traps and first-reflection traps. That way I can get an accurate picture of everything.