The Hayward SuperPump is very LOUD. I am replacing mine (only one year old! - you want to buy it??) with a super high efficiency Ikeric multi-speed pump. Very expensive to buy, but much cheaper to run and supposedly very quiet.

The Ikeric is a rebuilt, rebranded Sta-rite Dura-Max II (I believe), so that pump might be quiet as well. Since you are already replacing a pump, I would consider the environmental apects.

I would also recommend looking at a 2 speed pump. The price delta is small, but the cost savings can be substantial, and if you run your pump while you are swimming, low speed can be MUCH quieter.