I have a Marineland C360 on my 40 gallon. I never hear it at all and it provides a lot of movement. It's not as easy to clean as a HOB
, but its not too bad. I would definitely go with a canister, though. Big reason for me was that its hidden underneath the tank and only requires a little more than an inch or inch and a half for tubing between the tank and wall.
I don't keep cichlids, but strongly considered it. One thing I learned was that a lot of filtration is good with them, so getting a filter that is rated for a bigger tank might be worth considering.