I've probably run 20 Aquaclears or so, of every size, and they are the most quiet hang on back filter available IMO
. If you have not tried removing the impeller and cleaning the housing, then re-seating the impeller, that might work. If the impeller is bent or damaged, a replacement should make the filter more quiet.
If you still can't get it to where it's acceptable for you, a Rena XP1/XP2 or Fluval 205 would be good choices for canisters. A good canister is extremely quiet even compared to the best HOB