As for 120mm. I'd prefer the Noctua F12 chromax or Industrial for the black color scheme. Some other fans you can look into are the Be Quiet Silent Wings 3 High Speed. Corsair ML120 twin pack. Arctic P12 - value pack might be a better option depending how many you need. Phanteks PH-F120MP. These are the ones most will mention.
As for 80mm. I can't help. Haven't bought a 80mm or more so 92mm in years.
Noctua NF-F12 iPPC 3000! I've got the 140mm versions and they're great. They're deafening at full tilt but they're dead silent and move a ton of air at ~20%. Useful that I can crank them up when needed when benching