Mag drives can be very loud when you get into the 1800 gph and 2400 gph range, the smaller ones tend to be better, but if you are looking for quiet you may want to look into another pump. I'm pretty sure they are made for pond use, so they don't fit seamlessly into the aquarium hobby. They also produce a lot of heat and use a lot of power. How many gallons per hour were you looking to move and is this going to be a submersible pump or an external pump?