I have two similar-design exhaust/cooling fans installed in a cabinet that houses a cable box, wireless router, telephone converter, and UPS. The fans plug into USB ports, don't make much noise at all, and keep the four electronics devices plenty cool. I think 110v units would be huge overkill for your set-up, especially if you already have the table wired for USB.
I don’t currently have the table wired for USB. But it will be (is) wired for 110v... I ordered the 110 fan I linked since it appeared rated for half the dba as it’s nearest competitor. We will see. If the noise levels are intrusive it’s good to hear you’ve had success with the usb fans.