At work, we have the Ridgid. Now they make them with SNR (something noise reduction) so they are quieter.
At home, I have a Lowe's Shop vac, that I bought with a gift card. It replaced a dumpster dived vac, that had the hose going through the head into a metal bucket (don't remember brand). Since I have heard several people on my various forums, calling Shop vac, and getting a new powerhead sent to them (free after warranty expired), I wouldn't have a problem with them, I just prefer the quieter Ridgid.
Now my shop vac has been relegated more to wet duties (rare) since I bought my Fein. I bought it because it is a bypass style vac, and much quieter.