For those of you who want our bottom line recommendations on humidifiers:

For our bottom line recommendations, we like the Air-O-Swiss 7135 as a "Best-in-Class" cool and warm mist humidifier because of its quiet operation.

The Air O Swiss Air Washer Humidifier is a great combination cool-mist humidifier and air cleaner which humidifies a large room quickly.

The Graco Humidifier is a great value cool mist humidifier that is virtually silent.