Didn't mean to introduce any doubt, I was really asking out of curiosity for the reasoning. Stick to your game plan
FWIW, there are many folks that do have sumps and doesn't have to be noisy at all. I have my tank sitting between the living room and dining room, and I'd say it's fairly silent (using "herbie" drain/overflow). It can be done. I will say that the external pump I have connected with PVC for my closed loop circulation makes the most sound - a low, constant humming through the pipes.