Here is my quick review of the ultra quiet California Air Tools 5510SE 5.5 Gallon 1.0HP air compressor. This is now sold at Home Depot for $131.74. A really good price for a quiet compressor.
As a general use home air compressor, it does a great job inflating all sort of tires and air blowing dust of when cleaning, all at a low hum. Pair it with a long rubber air compressor hose and you have a convenient air compressor system.
Will add some picture later. 🙂
[Update: Walmart has it for $127.90]