Which Air Pump is Best

Hi all.

Looks like I'm going to have to replace my air pump as it is gradually producing less and less air. I'm not too keen to get the same as I have now, a Superfish Airflow 1, as it is quite noisy. I had a look at the following:-

http://www.aquatics-warehouse.co.uk/acatalog/aquarium_supplies_AIR_PUMPS_AQUARIUM_2.html

There seems to be quite a few to choose from. Anyone care to share any feedback about these or any others? I'm particularly interested on the amount of noise they make, as I don't like switching the thing off when people stay over and sleep in the same room as the tank.

Thanks.

Thanks for the advice, I'll give them a go.