I can't comment much as my tank size is 29G, but the Fluval canister filters are really quiet.
I wrapped mine up in memory foam and put tape over it so the vibrations from it's body get absorbed. Also, squeezed the output hoses between two blocks of memory foam to further stop vibrations, and routed them so they don't touch the cabinet.. or it will act like a big drum being vibrated by the hoses.
All in all, I have ZERO noise from 2-3 meters away. My Dolphin 560 pump is coming tomorrow.. it's external/internal, so I will immerse it in a small tank with rubber/foam on the bottom just to block it's noise/keep cool, and hook it up to some custom piping.. I'm expecting zero noise out of that one too, with plenty of water movement.
That's so far my solution to a bedroom tank
It also makes things nicer as I dont have any powerheads inside the tank taking up room, and maybe the fish will appreciate the complete silence.